Mark Levinson ML7 auction

I asked the seller and he confirmed that he can ship it to oversea. I won the auction about 10 days ago , met the reserve price but the seller did not send me the shipping cost to complete the deal. Subsequently I saw the same seller putting his ML7 to another Audiogon auction Which will be ended by tomorrow. I asked the seller but he did not reply. I reported to Audiogon and I have not received anything from them. I still want to buy this ML7. What can I do? Any advice is much appreciated. Thank you.