i'd buy it if has had 0 miles, the engine wasnt broken in and never had a single fluid put in it... actually no, i wouldnt, with 12g's imagine what i could do to the legend i already own?
that engine might be good if it was stored properly by a professional and hasnt been started since like 1991 so the engine wouldnt rott and be full of gunk.... if this is the case i would reccomend tearing the whole thing down and coating everything in assembly lube before cranking it or else that engine could possibly go within a few miles.. that car still wouldnt be worth half that price if that is the case since there isnt any way to be 100% sure it was stored. if i bought it then it would be only for the body.
you should expect atleast 10k miles per year the car is old if it had fluids in it or was in commission or else you probably shouldnt expect getting atleast 200k out of it. in this case i think you would get from 2k-50k out of it