I think in total I spent about £40 over the summer sale and got 10 games for it, equating to about £4 a game. I love you steam summer sale, my wallet doesn't, but you are a blessing.
In general, I only pay full price for any pre ordered game I want. Which hasn't been since March I think. Wow, I keep buying old stuff.
I've done that with a couple of games, but I really just hate waiting for a game. Especially considering every game I've ordered has arrived late. I'm a very impatient man when it comes to my vidya.