If you check prices of Model 24's on internet gun auction sites, it is important to watch them for a while and compare the sales prices only of guns which ACTUALLY sell. Then you must be sure you are comparing guns in similar condition. Many of the Model 24's you see listed with unrealistically high reserves or Buy It Now prices of over $1000.00 will still be there unsold two years from now. Those prices mean nothing except that the seller is hoping some dumbass with more money than brains will pay twice retail value for a gun.
I saw a first year of production model 24 12 ga. in decent shape with an asking price of $495.00 at a local gunshow yesterday. Vendors were complaining that their guns weren't moving so it sounds like we're still in a buyers market.