I have a very old barn on my place. Probably over a hundred years old. 30' X 40' with a large loft. The beams in the barn are the old mortise and tenon with wooden pegs. The barn is not worth repairing because the foundation is failing and part of the north wall fell off. About 2 years ago a guy stopped by and asked my wife if he could take a look at it. He came back to the house and told her it wasn't worth taking down for the lumber. About a year later he stopped by again and asked my wife if he could take another look. This time he said that it would be worth taking down because of the demand for the lumber and he was running short of supplies of it. He left her a business card and wanted me to call him if I was interested in having it taken down. I have never called him. I would like to have it down now because I would like to build a new barn on the site. My question is what should I expect from a deal like this? Do I let him come and take what he wants and then I have to clean up the mess that is left? Should he be expected to take everything including the foundation? Should he be allowed to take the useable material and pay me something for it if he doesn't expect to clean up everything? What is your opinion on this?