Sales thru international sellers can take longer to go to settlement due to the added paperwork that the seller has to submit. The good news is that the contract you're looking at has been on the market for a while (if it's the one that I saw back in July when I was also in the market for a BWV contract w/150 pts. and Dec. UY, it still hasn't sold), so you should be able to have some room to negotiate on price.
I figured that it has been on the market and I guess it makes me even more nervous. Should I be?