Local Sanden prices here are 195.00 new for a 508 and about the same price for a 510. A rebuilt one costs about a hundred bucks. This compressor will fit on a 5000 as long as an early mount ie before 1986 is used. A universal sanden mount costs about 50 bucks and can be welded/bolted to the early GM style 5000 A/C mount. Scott