i could see it costing a good amount if he did it right...... buying 250r motor, rebuilding atleast new top end, fabbing motor mounts.. electronics ( if did it right he should have a cr250 cdi on it)
now that i think of it its a 83-84 motor.. the 81-83 have a rear mount, they dont bolt to the swinger..
slap a dg gold head on there, dg pipe, and aport job and that thing will be an animal!!