Biggest thing I ever bought from an overseas (From France) seller are rims. I was very nervous about them getting to me un damaged, but it all worked out great as the seller packaged them appropriately. I guess I can try for frames next. It all comes down to the seller's rating. if it is 100% and you notice that the person had been selling a lot of frames, it should be safe enough to buy from them and expect no hassles or damage when they ship it to you. Anything below a 99% rating, you might want to stay away from.
Chombi