I commonly see Classic frames offered for $150 to $220 or 230 (and sometimes higher), with stainless running $15-20 more than blued. Frame prices are dependant on condition and vintage of course, but how much you'll get is probably based more on how bad a person wants what you have to sell. For example, since I am not a fan of the G2, I'd pay more for a clean used Classic frame than for a G2, and more for a easy open than older vintage.