Shipping speakers from West Coast to East Coast

About 3 weeks ago I paid for a pair of large floorstanders speakers. The demo pair was at a dealer and I added $500 towards shipping. Of course the large speakers have to be shipped by freight and probably would cost a lot more. I told them that I would add to the $500 towards shipping, but they have to let me know how much $. Well, three weeks have passed and the speakers have not shipped. I called the dealer last week and I was assured (again) that the speakers are packed and ready to go, but they have not found a reliable shipping company. Hmmm, you would think that a high end dealer that receives large speakers would have an agreement with at least one freight company to be able to send out equipment to costumers that are not local. I know that the audio store is in the process of moving, and that might have impacted the shipping of products. Bottom line is that I paid in full and the speakers are sitting in boxes (I was told) in the dealer's store and I still don't have an update. The dealer has plenty of positive feedback and I don't doubt that they are keeping their word, and also that they're busy with moving. Is it unreasonable for me to ask for a refund?