That price seems pretty steep. They could probably be shipped UPS or FedEx for no more than that, probably less. And their truck is coming to you anyway.
Regards,
Wayne
Might try selling it locally on CL, if she has some family or friends there that could help with that.
Is she coming to AZ empty handed, or is there a moving truck involved? If the latter, put the speakers on the truck and get them "shipped" for free!
Regards,
Wayne A. Pflughaupt