Minolta Weathermatic A 110 Camera at a car boot sale.
Minolta Dynax 3000 and Riva, on Bully's Prize Board on Bullseye (watch FTN at 7pm in the week!).
Not strictly speaking vintage, but a recent RSPB trip featured 6 slr's. One Pentax (my partners), 3 5D, 1 A100 and a 9 series with 400mm G attached.