So there is 680 in the pot in and we have 400 back effectively, i don't think i call here very often. I do ship pretty wide here, I don't have much time but a bit work with pokerstove should give you a reasonable answer.
Bit more complicated than this though innit, as presumably everyone behind us is going to call. So it's probably going to be an 8-way/9-way pot for about $1k plus the ticket, and then a $500 side pot with UTG.
Think I go JK's route and call with suited connectors and decent one-gappers, suited broadways and aces, AT+ 77+ KJ+..? Maybe. Or just fold and leave the table immediately.
Seems like a really good promotion to run, if you want to close down one of your cash games.