I can vouch for this one, I use it on my LiPos, it will do 3s and 4s. What I like about it is that it only balance charges so it is really healthy for your batteries.
But how much is the shipping?Since the emphasis is on cheap, this is the way to go, and if you let your browser sit on the screen for a minute or so, the price should drop down to $11.45. Hobby King does that with a lot of products if you don't add it to your cart or click off the page right away, it thinks you're contemplating.
They have it in the US warehouse with lower shipping costs, but the one you linked to on Ebay is the best deal!But how much is the shipping?
Get the original here.
http://www.ebay.com/itm/SKYRC-SK-10...128886?hash=item2ee3c97ef6:g:ikkAAOSwPcVVqNoS