I don't think price would be very meaningful, since the price will be dependent on area. A major metropolitan area with a high cost of living will have higher p

I don't think price would be very meaningful, since the price will be dependent on area. A major metropolitan area with a high cost of living will have higher prices, as will a small town that's 30 minutes from the nearest small city. And across countries, not only is there different tax rates, whether the tax is included in the price (US: no, Europe: yes, I believe), there is also the variation in exchange rate, which could be substantial. Then some stores may use the product as a loss leader, while others do not.