You're usually safe when the seller has a high rating number and a near 100% positive rating with it. I bought almost everything for my rc cars off ebay cause it was always cheaper, and their are some very good vendors that specialize in rc stuff. I bought my 6ex off ebay, and it was BNIB just like he said. I don't buy much airplane stuff off there because my airplane LHS has just as good prices w/o shipping, and I get it today. Just do your research a little into the product, like the el cheapo batteries, and the sellers feedback and u should be ok.