Those speakers are huge. Good suggestions here to use professional Craters and Freighters.
Another option would be to draw a circle on a map corresponding to the miles away you are willing to travel to hand deliver them. Double that circle and you would have the distance that you could meet a buyer half-way. I am currently looking for a very heavy subwoofer and there are several that have been for sale for the past 3-6 months, but the sellers simply will not ship them and the distances to me are in the range of 12-30 hours by car, which is too far. Based on this thread, I am going to get a quote from Craters and Freighters and, if I am ok with the amount, then I will reconnect the sellers to see if we can work it out.