Motorcycle Engine Anyone?

So I spent $3300 on a used engine for my motorcycle- installed. Hey my motorcycle is running and I'm enjoying it again. The motorcycle dealer that I got a second opinion from says that they will buy my old engine for $300. I guess $300 is better than nothing. It's better than trying to sell it on Ebay I suppose. I should probably just take the money and run. Money in my pocket would be better than 4 big boxes of engine parts sitting in my garage.