Also, what type of hardware do you have? If you posted some info on them, some people would be sure to help to see if they are something to keep, or toss.
Well, they do have recycling companies that handle just computer components. But instead of them paying you, you pay them. They want like $15 for each monitor, and $5 for each computer chassis. And for mouses and keyboards, they might want $2 for each pound of material.
But I highly advise against doing that. Because they are only going to break down the material into simple matter and sell it off. Your paying them to make money. What I would do, is strip the computers complete down. Keep all of the cpu's apart, and the ram, and the rest of the materials apart. Sell the CPU's on ebay under the assertion that they are for "material recovery only", you should be able to get some money for them. Now for the mice and keyboards, sell them on ebay, as one big lot. And for the monitors. I would just put an ad in the newspaper about monitors for free. You are going to have a hard time if you try to sell old monitors on ebay.
For example: (some guy is selling 50, old pentiums $1,450.00)