A lot of products you buy, especially those featured on The Price is Right, aren't sold directly to you they're sold to other companies/distributors for wholesale prices then they sell it on to you (or sometimes another step through a distributor). The manufacturer has no association with you at all and having them fix a price would remove competition from all those stores. It's coming really close to being a price control cartel too, it'll just mean stores can't compete on price to get you into their doors which will probably mean higher prices.