Bike flights is a shipping service. I would need your zip code for an estimate. One thing to note: after I posted this I noticed what appears to be a repair to the down tube connection to the bottom bracket. I am not 100% sure but it looks like that to me. I haven't bumped the ad for some time considering the repair.
Realize you are aware of the down tube issue, as you know that can be a relatively simple fix or a nightmare. How badly is the bottom bracket affected, have you verified that the BB is not out of round from previous work?