For $700 I'd pick it up. I had a suburabn with the 6.2 litre detroit diesel for a while and loved it. It was the model GM put in their diesel trucks after the 5.7 diesel was realized to be worthless. If its got a good engine go for it, too bad its an '80 'lack, they went to hell after '74. . imho. . .

__________________
". . .back before accountants designed cars"

-Current Stable-
'78 MB 450SL-C 107.024.12.020783 #3840 <Kayleen>
'85 FORD F250 6.9L Diesel <Allison>
'98 Lexus ES300 <Rachel>
Long Gone...
'74 Chevy G10...........................'99 GMC Yukon 4X4
'83 Chevy Suburban 6.2 diesel .....'99 SAAB 9-5
'90 Mitsubishi Eclipse GS............. '01 Chevy Tahoe
'98 Nissan Altima .......................'02 MB ML320
'88 Chevy Suburban V2500 4X4 6.2 diesel