For example Woot has the Typhoon H (non-RealSense) complete for $599 right now -- I think it was posted in the last couple of days because I had been looking on woot before I found my Yuneec refurbed TH Pro on Ebay from DealParade for $699 (which I am pretty sure is still active).
I will say that the package I got was indistinguishable from new! Extremely happy with the purchase.
Just wasn't sure. Woot is what I saw as well. The Q500 is $349.99 and the H is $599.99. I've purchased a lot of things from Woot and never had an issue. Bought my Q500 from them and as you say, could not tell it from new and have had no issues.