Shipping heavy speakers

+1 on U ship, they delivered a pair of Vandy 3a sigs to NC (from NY) with no problem.
Do you have the packing material? If not, I suggest getting them properly boxed and wrapped and put on pallets. At 240 lbs., they will need a forklift. Any serious buyer will offer to pay for shipping and insurance.
B

I will add to my previous post to say that U ship is mostly independent shippers who are making a living by transporting goods in the US. So, unlike Fedex or UPS, the guy who picks up your speakers is probably the owner. Uship vets their shippers, so you are not just hiring a guy off the street.
Of course, make sure they are insured and have good references/feedback. And, definitely get those speakers on a pallet.
B