I have a Knight original Disc that I bought new back in about 2001. I have shot it less than 50 times. It is stainless steel with camo stock. Has some wear on the stock from several hunts, but still shoots really well. 26" barrel. I am thinking about upgrading to something a little faster to clean, and my brother may be interested in it. However, I don't have a clue what these actually go for used. I want to be fair, but also don't want to get screwed either. Any ideas of what a reasonable price would be? Any input is appreciated.