Stans has a mix of fresh produce as well as "old" produce that I assume they get from local grocers. If you're willing to dig through a crate of moldy berries to find the good package, then you'll get a good deal. Some days I have patience, some days I don't. I find Lotus Foods to have cheaper produce than Stan's, and generally of better quality.
I have gotten some killer deals here before, such as a bushel of apples for $5, or a bag of grapefruits for $1. It's just hit-or-miss, soyou have to be careful...it's no Giant Eagle. I always swing through when I'm in the strip, but caveat emptor.