Bud's had a bunch of Model 10's a while back, if I recall they were selling them for the low-mid $300 range and several campfire posters got one. A gunshop in Staten Island has three well used NYPD trade ins on gunbroker right now but demand is driving prices up, one is at $455 with 6 days left and another is at $320.

https://www.gunbroker.com/item/877257039

Decent 10's are being bought up for prices in the mid $500 area and one in very nice shape just sold for $600.

About 10 -12 years ago I couldn't give away a Model 15 for $200, no one wanted them.

Gunnery, gunnery, gunnery.
Hit the target, all else is twaddle!