Shipping heavy speakers

+1 for the prior post in getting comparative quotes from branded reputable couriers , but with the express understanding that that they are PROPERLY prepared for shipment FIRST to avoid tragedy .

Do you still have the original OEM boxes and (presumed) shipping crates and  other packing materials (Y/N) ?

if not, I would heartily recommend that you first contact the speaker distributor and order up & pay for the OEM replacements as a cheap cost of insurance and peace of mind against getting them banged up and damaged during delivery. 

They are going to be crated and likely also secured to a pallet because of their extreme size and weight,  just even to get them properly insured  for transit
 
There is no cheap short-cut here, so it is going to be unavoidably comparatively expensive. 

Or else ....... full stop.

Freight is your only safe alternative.

And I will repeat what has already been said,If you have a serious buyer they will be patient and be willing to pay 3 to 5 hundred dollars that it will take.

Or hold out for a local pickup which might take a very long time.

Best of luck to you and proceed very cautiously,
Kenny.

I shipped my Revel Salon1 with BaxGlobal. Bax was great.

For 800 mile-away buyers, both of you could drive and meet half-way.