***FOR SALE*** ResMed S9 VPAP/CPAP ST RRP $5,000 w/ Mask

[palerider]

The ST is priced as a specialty end machine, 2-3x as much as a bilevel auto. it's able to treat central apnea, the VPAP Auto isn't.

BiPap is a trademark of Philips Respironics.

I didn't know BiPap was a tradename, like TelePrompTer.

I took a quick look on eBay's sold search and couldn't find any sold entries for VPAP ST. So a rare beast. But all I've heard in terms of treating Central Apnea is ASV over and over again. I really will have to get around to reading more of the FAQs.

Here's one: https://www.rehabmart.com/product/s9-vp ... 43321.html

VPAP and AirCurve, Resmed trademarks for bilevel.
BiPap, Respironics trademark for bilevel.

[Stom]

VPAP and AirCurve, Resmed trademarks for bilevel.
BiPap, Respironics trademark for bilevel.

Ah, thanks, that helps clear up some of my confusion - not to worry, plenty more where it came from.

So here's the key in my mind (I've read a few threads on it and I'm still unsure of the answer): Are the mechanical components of the the different bilevels any different than an APAP with EPR? Or between different models of bilevel? Or are Philips and ResMed just charging a huge premium for the firmware differences that enable the different algorithms?

(I do assume that machines that can handle higher pressures may have different components, but even that could be subject to crippleware.)

[palerider]

So here's the key in my mind (I've read a few threads on it and I'm still unsure of the answer): Are the mechanical components of the the different bilevels any different than an APAP with EPR? Or between different models of bilevel? Or are Philips and ResMed just charging a huge premium for the firmware differences that enable the different algorithms?

(I do assume that machines that can handle higher pressures may have different components, but even that could be subject to crippleware.)

I've seen the inside of a few Respironics PR System One machines, 50 and 60 series. They use a different circuit board on some of the different ones, with an extra button on some.

I've taken apart a Resmed S9 Elite, Autoset, VPAP Auto, Adapt and Tx... they're all identical inside. Same motor, same circuit board, same same.

One of these is from an elite (single pressure cpap) and one is from an Adapt (ASV)

https://i.imgur.com/CCTXAAU.jpg

As far as I know, they continued this build process with the Air10 series. I've only seen pics of the insides of a couple of them.

[ChicagoGranny]

People are crafty when it comes to making supply meet demand.

Actually, supply creates demand.

[Stom]

Actually, supply creates demand.

If that were true, then these boxes and boxes of VHS tapes I have are going to be worth a fortune!!!

Supply, on its own, does not create demand.

[ChicagoGranny]

If that were true, then these boxes and boxes of VHS tapes I have are going to be worth a fortune!!!

Supply, on its own, does not create demand.

You only have inventory not supply. You did not supply the VHS tapes. You bought and consumed them.

Your example actually is an example of supply creating demand. None of us were sitting around in the early seventies wishing for VHS tapes. But, the Victor Company of Japan was busy developing VHS. They introduced (supplied) them to the market in 76/77 and created a huge demand.

[Stom]

Your example actually is an example of supply creating demand. None of us were sitting around in the early seventies wishing for VHS tapes. But, the Victor Company of Japan was busy developing VHS. They introduced (supplied) them to the market in 76/77 and created a huge demand.

It think you are using a definition of supply that includes a successful **marketing** campaign. The mere existence of a supply of VHS tapes didn't create the demand. While your specific broader use of the term may be a term of art in economics (I'm not a student of the field (to which you can say "obviously," if you wish)) but whether it is or isn't I think you are using the term in a way contrary to common use.

[LSAT]

Granny is right

[ChicagoGranny]

Did anyone want a CPAP? Did anyone ever demand a CPAP? Most people thought the idea was horrible. But, Sullivan et al began to supply CPAP systems, and the demand followed.

BTW, sales and marketing is an integral part of supply.

[Stom]

Granny is right

Ok, then we should move on to important things, like which end of an egg to eat from.

[chunkyfrog]

Once again, CUTE . . .

[ChicagoGranny]

Ok, then we should move on to important things

If you think our economy and technological advancement are important, then supply goes to the top of the list.

[Stom]

If you think our economy and technological advancement are important, then supply goes to the top of the list.

At this point I only care about the supply of eggs that can be eaten from the small end...

(It is breakfast time on this coast.)

[ChicagoGranny]

At this point I only care about the supply of eggs that can be eaten from the small end...

(It is breakfast time on this coast.)

Sorry for being so inconsiderate. I've already had my usual two jumbos sunny side up. (One of the yolks broke. I just hate it when that happens.)

[Fetou]

People are crafty when it comes to making supply meet demand.

Actually, supply creates demand.

Sleep apnea as a condition creates demand for treatment. The medical device developers have responded with research and product development to supply the demand.

So now we have demand for the treatment and a supply of treatment devices. The government of course steps in and puts massive limitations on supply with regulations and together with a convoluted and mostly unaffordable system of insurance, prices are inflated from where they would be if there was unrestricted free exchange.

So we have a class of consumers who are willing to pay for treatment but can't afford or are unwilling to follow the prescribed method of obtaining the treatment. Then there is a group of people who have the treatment devices, but aren't authorized to sell them. These devices are not well tolerated, and often returned, both of which would create a healthy secondary market in the absence of restriction.

So my main point, to avoid getting lost in semantics, is that markets almost always form and find a way to fill a demand where there is some profit or benefit on both sides. Without any announcement or instructions, you have buyers and sellers learning how to form and interact within grey/black markets through a third party listing service, using certain key words and methods to avoid outside interference. It's a beautiful thing!