T56 vs. 833 + gearvendors

Too bad you didn't ask a few years ago. I sold a Tremec 6-spd on ebay for ~$700 (GM model). DHL brought it to my door in place of the used 413 tranny that was shipped (showed up 3 months later). After many months trying to get them to take it back, which they did once then returned, I told them I would sell it if they didn't keep it and they said "fine". I researched and found it was a desirable part. Should have kept it for the Dart I later bought.