It is indeed a really cool little game. The cheapest it's been on this site to date is 70% off (6.99 USD), which is what I paid for it. It's the most expensive sale-priced game I've bought here, and the second most expensive individual game, but I don't regret it. Being that the last time (and first time, I think) it was that deeply discounted was in March, it's hard to say if it'll be that cheap again whenever GOG's next big sale rolls around, though -- they seem to avoid discounting the exact same bunch of games on consecutive sales. If you didn't pick it up in this week's promo, you might have to wait awhile.