I have been considering building a light ATB type bike out of a 90's MTB frame. I have been looking for something all aluminum in my 23" frame size but nothing has surfaced in a while. I found a Specialized Hardrock non suspension all steel frame from the 90's in my size for $125 locally. It has been kept in the dry and the frame looks pretty good. I had originally thought a Rockhopper had a better frame, but I might get this Hardrock if there isn't that much difference in the frames.