Most times you've bought a single game?

[torok]

Resistance 2 - the first disc broke, bought a replacement because I played it online all the time.
God of War 1 - had the games on PS2, bought the collection for PS Vita.

I almost bought Uncharted 3 again, in the Nathan Drake Collection. I did not had UC1 and 2 and the price was decent. However, before buying it, a PSN flash sale put each UC game for 7 dollars, so it was a no-brainer to get them for PS3 there and I ended up not buying the collection.

I don't buy the same game again for GOTY editions or to have it on multiple platforms. I'm not putting my money on the same thing twice. Buying a replacement is reasonable. I also thing that buying collections is a good decision even if you already have some of the games included, as soon as the collection is cheaper than buying the remaining games.