knickerbacker and boito doubles??

[benttip]

I have an old double "Knickerbacker" in quite good shape and a double barrel"boito" made in brazil in good shape also.12 guage.Was wondering if any one could give me just a ball park figure on what these guns could be sold at..I know without pics its tough but just need a rough idea .$100-$200-$300 Or??Am new here so pic stuff will be a bit...lol