The day I won my Theda, I got an e-mail offering to buy it for $200 more than what I paid.
So I would have turned a small profit, but I wouldn't have been able to replace the bag for $1200.
If selling it puts you closer to a different and more expensive bag that you will LOVE, then sell. And right now, that's a hot bag. If you really like it though, I'd keep it, as buyers remorse may cause you to hunt for a new one, and what with supply and demand...you may end up paying MORE a second time around.