Yes, there are laws about how long a sale can be, if a product is on sale for a significant amount of time the seller has to make that price the actual price an

Yes, there are laws about how long a sale can be, if a product is on sale for a significant amount of time the seller has to make that price the actual price and cannot advertise it as "on sale." Likely those stores run afoul of this law but are too small to be prosecuted by the DA/FTC.