Prototype GameCube Controller Price?

I was wondering how much a prototype gameCube controller would cost?
Here is an example of one:


Here is another example of one:

 

I've buy one like the second one for 100$US back in October 2011.

See: http://www.assemblergames.com/forum...inout-(Yes-it-s-compatible-with-regular-Cube)

 

That one for 100$ was luck. Id say 200$ and up would be a fair assessment, depending on the controller. There have only been a handful for sale here.

 

I've had and sold a few of the bottom style for around £75 each but my prices are always on the cheap side so you could probably expect a little more, maybe £100...

 

How common are these controllers, and do you know anyone who sells them?

 

Well they aren't as common as a standard controller if that is what your asking.

I have had around 4/5 over the past few years and know of maybe another 10 or so with various people I have spoken to but many more will exist.
You won't find anybody selling them on a regular basis though...

 

Yeah, I might be interested in getting one of these if I could snatch one up for under $125.

 

I am definitely interested, I would buy a couple. If anyone finds one for sale, but maybe a little too expensive for them. Post it here, maybe one of us will get it.