New ones sell between 250 and 450. Trade in is going to be around 40-70% of what a used one will sell for depending on the age and condition of the Ruger. You wont get the best trade on most handguns unless you already have a pretty good relationship with the shop you are trying to work with. A lot of times you're better off to sell it yourself. but if you can get 250-300 out of it I'd say you're doing pretty good. The P89 was not seen as one of Rugers best works. They were not all that much to buy and they're reliability was hit and miss for a few years.