Ok here's the deal--I managed to scrounge another 10 trackballs up--7 Happ and 3 Betsons. 1 Happ is tentatively sold (awaiting payment) and one is waiting for a part so that leaves 5 Happs and 3 betson's available.
happs are $29.99USD + actual shipping -$5BYOAC shipping discount
Betson's are $24.99USD + actual shipping - $5BYOAC shipping discount (these are cheaper cause for some reason betson's aren't as popular and as a result take longer to sell--so I lower the price and they move like Happs--go figure)
No surcharge for multiball orders even though I have to build custom boxes--but for you guys, I'll let it slide

All units have been fully disassembled, cleaned in the dishwasher, and fully tested using an optipac. Comes with original wiring harness/molex plug.