Bought:
11-24 f4, amazing lens, it truthfully does go to 11!
35 f2 IS, best $325 I ever spent on a lens (off CraigsList).
Sold:
16-35 f4 IS, I miss it, despite getting the 11-24, but was offered $50 more than I paid for it.
1VHS, had two I bought new, sold one with only 35 rolls of film through it. Got $700 so that film cost $43 a roll in camera depreciation.
Yongnuo RF-602 remote trigger set (X4), became entirely redundant because of the 600-EX-RT's but held on to them because they were so reliable.