The Temple of Elemental Evil
Heroes of Might and Magic II
Might and Magic Heroes VI
Fallout collection (Fallout, Fallout II, and Fallout Tactics)
Zeus: Master of Olympus
and something called No Man's Land: Fight for Your Rights! (which is only the discs, probably given away with a magazine or something).
All for the grand price of about 3€ (30 SEK). A few days ago at a flea market.
Already have all of them, except No Man's Land and Heroes VI, on GOG, and apparently already had Zeus on disc as well, even the same edition (Sierra Best Seller Series), but I like physical packaging (though Heroes VI says to require "a one-time internet connection on first launch", so that may be a dud and not register, but we'll see), and No Man's Land looked interesting enough to be worth its asked-for price of about 10 cents (and likely added nothing on top of the rest).
ToEE is in a double-DVD-sized box, and I don't know if that had a big-box release (I don't think so), but at least it's not an ugly later low-price box.