i agree with hoss. offer your client something that makes you a valuable asset to them. money, service, or ? spend a little time talking to your client and find out what that client is looking for. and then provide it.

larger clients are concerned about proper disposal and that their data is properly handled. many of those clients will pay you to remove their items as long as you can provide proper documentation showing destruction of data and proper recycling of their electronics.

what you see as valuable scrap, many clients see as potential problems. you need to look at their scrap thru their eyes. alleviate their problems and you will gain both a customer and future reference.