So a co-worker tells me about a company sale of a used MacBook Pro. Exact version/model isn't available but the 15" MBP is speced wiyh a ntel® Core i5540M 2.53 GHz processor. The price seems reasonable but there's a catch.....no OS included. I expect it was low-level wiped to remove business data. So the question is, how do we get an OS to do the initial install? Since all Apple laptops include an OS as part of the price will an Apple store restore the correct (sold with) version for free? Fee?