Before I got into RF, I used (and still do) only Canon SLRs. So after I got into RF, I sold most of them - missed them and got them back : Canon AE1P, Canon AE1, Canon EOS 630, EOS RT, 10D - sold them all, got them all back, gave away manual focus Canons, but still have EOS models. With RF cameras and lenses I tend to keep what I like and sell what I dont. Almost sold Canon 50/1.2 LTM, but glad to have kept it or it would have been one on my list too. Oh wait - CV 21/4 - had it twice - sold twice. I would have kept it, but I got Kobalux/Avenon at that time, and it won a toss up (no surprise there), so CV21 got sold again. Plus there some lenses I like so much - I have more than one copy of them. Sometimes I sell one of them, but always keep the same one - Nikkor 10.5cm in LTM comes to mind, as well as Hexanon 50/2 - still have 2 of these for both Hexars.