used 7100i price

greetings!
i just upgraded to the 8350i and was wondering what you guys think would be a good price to ask for my old 7100i. i have no use for it, so i'm going to put it on craigslist. its in good shape, w/ 1 spare batt., but the charger is broken, so i'm going to include a usb. also, i lost the manual & cd. i think 50$ is about all i'd get. opinions?
thanks!

I just bought one from craigs for $30 with manuals and chargers...clear sim so I think $50 is a bit much check on eBay they are running around $20-$45 depending on condition and of course extras