GOG.com Spring SaleWatch
Some recommendations from myself:
Heroes of Might and Magic III for £2.19 (500 word review)
The Longest Journey for £3.09 (500 word review)
Thief Gold for 69p (500 word review)
Oh, and they also sell games made in the 21st century, if that's what you're into.
Mable & The Wood is currently on giveaway for the next 48 hours, a surprisingly new (August 2019) Metroidvania game. Review scores seem middling at best, but all the more reason to grab it while you don't have to pay anything, I guess.