sold a transmission now having buyer problems

.............I would refund the money, after all water in a tranny is never good, what good is a tranny that wont make any miles, the guy obviously needed to drive his van.......the shop should not of put the tranny in....I would not knowingly sell anybody a tranny for any price if i didnt believe it would work properly....kim........ u have to look from the buyers prespective also.......he payed to have it put in+atleast $100.00 in parts and fluid........i know, u play the game, u take ur chances........