Scammer or dumb trader?

I would say it was a dumb scammer...

Makes an offer ridiculously in your favor using keys outside of the trade window, asks you to go first, and disappears when you ask about steamrep? Definitely a scam.

P.S. for future reference, don't ask them to provide the Steamrep link, as it's an opportunity for them to link you to someone else's profile (like, someone they're impersonating). Go to steamrep.com or steamtrades and check their profile URL yourself.

Maybe he really went offline? Why would he try to scam bundle keys?

Maybe he went offline to go get his Most Honest Trader award?

Why am I seeing "spammer" instead of scammer?

Did someone say Slammers?

(meant to be reply, oh wells :P)

"X is now Offline." yep.. his mother called him