I think a used M-700 BDL is worth $450 or so, but an ADL with its blind magazine and often cheap quality stock, I wouldn't go much more than $350. Having said that there is a wide range of quality in these rifles and I did own a M-700 ADL for some time that had a very nice piece of lumber with cut checkering attached to it. So lets say $350-$500 depending on the example.