Anyone know where one can purchase reliable and cheap combination locks? I used to buy ones from DollarStore, but my past experience tells me they are easy to break. The ones in supermarkets are quite overpriced.

Dudley locks are the best. I've had the same lock since grade 7 I think and it still works perfectly. I just checked online at Staples and they're $5, so they're pretty decently priced as well.