As stated there is no shortage of mdl 12"experts". I would feel safe to say that the serious collectors own the vast majority of them, especially the more valuable ones. The ones we see "flooding the market", have likely been picked over already, but people pass & good ones can pop up. I'm thinking you MIGHT have a heavy duck model, in a not as sought after gauge. No pics, grade/mdl unknown, I wouldn't venture a guess as to the value. I think they are a great example of US craftsmanship from days long gone, & hunt well to boot. As a NON mdl 12 expert, I think the price listed is either too high for the gauge, or too low if it happens to be in a more collectable grade/mdl/condition. ANY attempts to modify/alter/improve it will lower the value. DO MORE HOMEWORK, a Winchester mdl 12 forum would be a good start. Hope this helped & good luck.