Bought so many I lost track years ago. At one time had 36 AD's split exactly even with 18 5w and 18 3w. Probably built a dozen for customers and through the years cannibalized parts from the remainder till any parts remaining will have to be removed with an air chisel or cutting torch. Price wise I quit buying when they got above $500. One purchase I do remember; bought 3 (52,53's) from a pilot and as I was leaving he said he had some engine parts in the trunk of an old Pontiac that would go with them. Turned out to be the triple side draft carb set up and dual exhaust for a 54 Corvette. ONE super good deal and now as for the bad deals I made---pull up a chair.