I always peek in the 'throwouts bin' in the supermarkets - often they have things that are excess or obsolete, or near to expiry date.

I picked up this way "Lingham's Sweet Chili Sauce" - brilliant!

Also things like 'Wasabi Sauce' and all sorts of things that I add to cookups to modify flavour - occasionally, as with the Lingham's, I hit a real winner! I found it on the normal shelves later - that batch was just close to the expiry date.

Things like curry lentil pie, and other 'on the spot - not advertised - specials' which I normally would not buy, but look for now as 'regular items'.