did you buy a new bike? if so, get with either fuelmoto or dynojet and buy another license for your powervision. $199 bucks and you'll be able to use it with the new bike.
if you didn't buy a new bike, and you're set on selling the powervision, then the new buyer will have to pay the $199 fee to fm/dynojet before he'll be able to use it for anything other than logging/clearing dtc's.
if you sell it, I wouldn't go any higher than $125.... (someone else may pay more, but take into consideration, with the license fee, that takes it up to $325. for not much more, you can get a brand new unit)