In the region I live (New Jersey),depending on the options it has, a K2 gas with both heads (especially a 3-row narrow),in good condition can be worth $3000-$5000. Diesels tend to bring a grand more. Dealers will get $8000 for a really nice one sometimes. Along with the little Gleaners, I've seen MF 300s, IH 615s and JD 3300s at farm sales around, and the Ks and K2s always bring a lot more.