Always on the lookout for interesting-looking circuit boards from scrapped aerospace/military electronics, for educational / reverse-engineering / artistic purposes. I have a good deal of through-hole avionics from the 70's/80's already, so especially interested in slightly newer surface-mount items like the attached photos (taken from a video by a "Mr Su" on douyin, and vipclubmn.org's photo collection, respectively). Can pay up to occasionally ~300 USD for really worthwhile stuff. Damaged boards are ok.