Jamie,
There are some really good buys now on low to mid grade guns. Go to Gunbroker and Gnus America and watch for a while. Focus on what you think you'd like such as American vintage SxS's liek AH Fox and LC Smith. After a few weeks you will see a few guns sell but most won't. Go back and study the ones that sold and the selling price. For an exact match to that gun (which is impossible...) the selling price is should be what the market value is. There is always the exception so try ot get price points on 3 similar guns.
If you have questions as to why one sold for $xx and another for $xy then post the links to the autions here and ask questions. Answers you will receive.
