I do have to say though... I applaud the seller for having this in his fine print...
"This is an advanced mechanical mod. Not for Beginners. Requires knowledge of mechanical mod, switch, springs, batteries. This device, if not set up properly could cause damage, harm, and/or loss. Only use high quality IMR batteries. If you use any other types you run the risk of the device causing damage, harm, and/or loss. There is no support for this item.
Rebuildable Atomizers (RDAs or RBAs) are for EXPERTS and ARE NOT recommended for average users or beginners. The use and knowledge of how to properly test for shorts with a multimeter is a very important factor when building your own coils and wicks. WE DO NOT OFFER ANY WARRANTY, REFUNDS OR EXCHANGES ON ANY REBUILDABLE ATOMIZERS DUE TO THE NATURE OF THESE PRODUCTS."
Though I'd applaud more if it was at the top of his listing...
To the OP... It's probably not a scam, but the quality probably isn't going to be great... But more importantly than that, just as stated, if this is the first device he's looking for, I would not recommend it... at all...