You'd probably be better off selling your gun outright and then buying the Ruger. Gunshops are in the business to make money and will not give you much for your gun. I'm not a Ruger owner but the consensus is that they are not the most attractive guns, but very durable and reliable. It won't be a Smith but it will serve your purpose. But for that asking price you can probably find a Smith for about the same amount. Look into prices for the M&P's in 45 cal.