And you can give it back to Apple if you're not pleased or suddenly need the money somewhere else.You can buy a refurb of that same model (13"/4GB RAM/128GB SSD) directly from Apple for $1099 plus tax, and it will come with a full year of AppleCare warranty. They seem to be in stock quite frequently.
I'd say 1000 even is fair considering you can get official apple refurbs all day at 1099 and 900 or less at BB OB (takes a bit more work).Seems fair if the condition is perfecft. Might be a little higher than what you find but at least, it comes from someone you know, not a shady guy from craiglist. PLUS, you doing him a favor.
I'd go for it, maybee try to push it down to 1050