I don't understand - you got a gps that you haven't used for a long time. You finally updated its software so now it should be good to go and now you want rid? Software updates are usually fairly quick, especially if you keep it the unit to date and they really don't occur that often. Never mind, Rob Goes Walking is looking for one - why don't you PM him?
Sorry for the delay in my response, a busy few hours at start of shift.
The time and date is now reset. Can't say the same re the software. It's an etrex summit HC, no slot for extra memory so the maps it can store are limited. Downloading another map is a cumbersome process, and you have to erase previous maps to get any useful memory. I would offer it for sale except that I don't want to saddle the buyer with faulty goods, if that is the problem, and in any case it's obsolete by current standards.