not knocking anyone but I personally stay away from any used rotating parts,Cranks,rods,pistons cams/lifters,rockers stuff like that.... I will Buy used: Ring and Pinion's, Tranny's cause I would have it rebuilt anyway...TQ converters are a Big NO-NO.
One thing..I personally believe used parts should never be priced more then 50% of original cost of the part no matter how little its used...used is USED in my book.
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "