How to get TP2 for cheaper?

[fuzzybabybunny]

I'm on Sprint and I can't stand my original Touch Pro anymore.

1. I've still got a year and a half more to go before I qualify for any phone upgrade discount.

2. I've had to get my phone replaced 3 times for bad quality issues. Probably a 4th time by tomorrow because the right D-pad doesn't work.

3. I don't qualify for the corporate discount.

Can I argue to get a discount on the TP2 based on number 2? What other options are there for getting a TP2 for less than the $400+ price on eBay?

If I were to get a TP2 on eBay, would I HAVE to get a Sprint one? Or can the Telus, Verizon, and TMobile versions still work?