If it seems too good to be true, it probably is.
I made the mistake of ordering something from a seller that had the lowest price also. Right away I got phone calls from the company harrassing me to buy more than what I ordered. I cancelled the order, but was worried because I'd read (after the fact) that this particular company was sending products out anyway to those cancelling orders, removing the UPC codes so you couldn't return them. I made some phone calls to VISA and FedEx to see what recourse I had if I got products sent after cancellation, but fortunately, it never happened.
Long story short, it was a PIA. Stick with the reputable guys. Trying to save a few bucks isn't worth the potential hassle.