Everything
A lot of times they have great deals on produce - like apples for .25/lb or a whole case of bananas for $1 (for those you better have plans for baking a lot of banana bread or something though because they are usually just starting to get some brown spots) i have also found things like salt or baking powder for a really good price. You really never know what you will find.
It's one of those scratch and dents Insurance write-off places be careful some food items have expired dates and compared with your local grocery store because some things are more expensive but that said still a great place to find good value specially in the frozen section
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