I'm guessing it's a store that's required to. When stores are audited for pricing discrepancies, they are only allowed so many errors as "acceptable". With repeated violations comes HEAVY fines and MANDATORY price tagging. If they have signs at the registers stating you are entitled to a cash bonus (i.e. $3) in addition to the overcharge, that's a dead givaway that's the reason. Check K-Mart sometime. I think more stores are required to tag than those that aren't!Yeah, very nice!! Why does goofty Wallymart put those price tags on that stuff?? Stupid.