If it's near mint I've seen them go for $1000+ on GB. If it's very nice with honest wear, no rust, shiny bore and good wood, they still go for $750+. Really just depends on the day and the buyer. If I was looking for a nice one, I would go in expecting to spend at least $700. I recently bought an absolutely mint 1981 Wingmaster on Gunbroker for $340. It's worth way more than that, but I got lucky. I also bought a '65 Wingmaster that was around 85% with no rust for $300 from the same seller. I SBS'd that one.