$200 is fair for a touch pro. Its just a bad time to be selling it. With the onslaught of TP2's and Hero's and Pre's etc the market is just going to go down quick. I'd hold out on your price for now, but be mindful of the going prices on ebay...
I still see a lot of people going back to the Touch Pro because they say the Touch Pro 2 isn't much different or blah blah blah. I personally think it looks awesome so I dont know what they're thinking.
Anyways, I ended up keeping my $200, but added Best Offer. i need this phone sold and if $200 won't cut it, then you tell me. PMs will work, or replying back.