Heavy speaker shipment

I have a problem and I figure that you all might be able to help out with. I am buying and selling a pair of speakers. The same individual that I am buying my new speakers from is selling me his pair and it was my intention to have one shipper drop off one pair and pick up the other pair at the same time. The problem is that I can ship my speakers from my work to his residence, but Bax will not pick up from a residence, only deliver to one. I'm trying to make this whole arrangement as simple as possible. My crate weights 305lbs and his two weigh ~170lbs each. Does anybody have any suggestions as to what reputable company might be able to offer this kind of service at a fair and reasonable cost. Thanks...Skip