totoreadorJust my two comparative cents...
If this product is like others I've seen on Massdrop (a big "if", I know), the basic production and concept are produced in China and resold (and legally rebranded) in the US (and elsewhere). The versions listed on eBay and via JYE will ship from China, will be impossible (or prohibitively expensive) to replace or return, you'll pay $$$ for return shipping on refunds, and it will probably (but may not, in my experience) come with everything you need to use it out of the box. The version available directly from Elecfreaks is more expensive when you add in shipping and will be no faster to ship.
For me, bottom line, I'll buy this from Massdrop because returns/replacement will be simple, if even needed, and the price is reasonable when compared to other domestic suppliers.