Hi, I bought a Powerbook a few years ago for my grandmother along with the full retail version of Leopard (I believe it was non-family pack). Anyway, I installed it on her computer and it runs fine. She uses it for email and Solitaire. Flash forward three years, and I am selling off my computers and software. One of the items is this full install disk. Can I sell it to someone else, or do I need to go up to grandma's first and erase her hard drive? Would the buyer be unable to use the software, or would it just conflict with a technicality in the EULA? What would you recommend? Thanks!