Why don't you contact the machine shop to get a price for the sleeve install and also have the block checked for any other issues? If you're buying off of your buddy he should have a price for the block unless he wants more for it then he paid for it.
I'm not worried about the price to put in the sleeve, more so the cost of the block in that condition. I'm trying to get a rough idea of what the block is worth before he names his price.
