If they are smart business owners they will only pay the going price suggested by the market. In order to make the profit they need to keep running their business . If they charge any different prices it is because they are trying to increase their profit margin. You need to check the scrap prices on the net to see which one is worth recycling your scrap at. Www.metalprices.com/FreeSite/metals/cu_scrap/cu_scrap.asp