[WTB] TMNT Fast Forward figures

[Digital Ghost]

I've only just begun researching these figures and I have a few questions.

How long have they been out?
I doubt I could find them at a Toys R Us these days.

Where can I purchase the four basic (first line) turtles? There are very few on eBay and none on the Canadian site. At least, none of the ones I'm looking for.

What should I expect to pay, or rather, what are they worth?

Let me know!