In order: model, date and price:
Black Q-S1 (May 2015) $245 with 02
Yellow Q7 (September 2015) $230 with 02
Black Q7 (2016) $225
Red/gray Q-S1 (2018) $208
Silver Q7 (May 2019) $300 with 01, 02, 06, and 40.5 polarizer
I have three 01s (one is de-centered), three 02s, one 03, three 06 (one is dead), one 07, and one 08.
I've also got 6 Auto 110 lenses, numerous c-mount and d-mount lenses and various adapters.
I don't have any justification for having more than two other than: I got them for very good prices and as "insurance" in case one of the bodies died, which hasn't happened, of course. I don't think I’ll be getting any more although there is a
pink Q10
on ebay right now that looks inviting.