1. Wholesale is around $33. Retail tends to run $45~$55.
2. Actually, Youde makes very good quality products, often times superior to the more popular clone devices... and more often than not, Youde products are designed in-house... rather than simply producing sub-standard copies of someone else's creative efforts.
The Youde IGO W series of RDAs is a good example. I'd not be surprised if a survey, of long time RDA users, revealed the greatest percentage of first time buyer, RDA purchases began with a IGO model.
Yes, like all things Chinese, they are made to a price point that budget conscious Americans and Euros find acceptable, and they are prone to exaggeration ("no voltage drop")... but of the handful of China manufacturers that I'm comfortable buying products from, Youde is near the top of the list for consistent quality.
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Ed_C... I note that Youde lists a 9 amp upper resistance limit. Perhaps because of the limited contact associated with a side button... just a guess. This means that (if you choose to follow their restriction) your practical safe resistance limit (with a 10% safety margin) is 0.5Ω+. Something to consider if your typical resistance runs lower.
... but I'll need to push the button before I add to cart. The description 
