Here is a tip when buying equipment at auction from a place of business like a machine shop. The first place to go is to the foreman's office and see if there are file cabinets that have information on all of the equipment that is being auctioned. Many time the original manuals for the equipment is there. The auction companies don't care about seeing if there are manuals for the equipment that is auctioned. If you buy a piece of equipment make sure you ask to have the manual included in the sale if it exists. You can also bid on all of the office contents, usually very cheap and keep track of who buys what and sell them the manuals, the buyer will usually pay a good price for the manuals. In many cases you can get all of the money you paid for the office equipment and content with the sale of just a couple of the manual. Sometimes there is also tooling and some spare parts in the office that is overlooked. Money can be made buying office stuff.