I tried tubulars back in the '80s when clinchers were still not cool. Much hassle. Valuable if you need them, but too much trouble if you don't. I agree with the resell approach. Knowing the China Ebay business model, I think it could take you forever to reverse the sale and get paid back. And your shipping costs back (with insurance) will surely be higher than you paid to get the tires to you. Make sure to feature the comment, "Shipped from the USA (or wherever)." in your sales pitch on Ebay. That ought to attract customers who want to avoid problems similar to what you are experiencing. The slightly lower price will also help.

Good luck.