GOG are currently running a sale on Interplay's games, and on top of that have a bundle deal giving 90% discounts on the games' base prices - that works out at either $0.59 or $0.99 per game, depending on your selection.
Although advertised as a minimum of 10 games, the 90% discount appears to kick in once 9 games are selected, giving a minimum price of £5.31. The bundle is available for one week, ending on Sunday 2 October.
Highlights include the following, but follow the link (or see the first comment below) for the full list:
Earthworm Jim 1/2/3D
Giants: Citizen Kabuto