Well before you even calculate the cheap shipping and who your merchant is going to be don't forget about customs.
Customs duties can eat your profit alive especially if by any stupid chance your item gets classfied into wrong category.
Example I was importing camera bags from england. When marchant put photo equipment bags I got charged one way, if he put that those were regular bags I was charged something different. On top of that when he said material was canvas I paid differently than when he said it was canvas and leather.
Just a word of advice since I had a successful internet bussines until all of that backfired and my profits went down big time.
Matt