its a verified seller with over half a million positive reviews and a registered company in germany. so i am quite sure its legit. but yes, the possibility always exists of course.

Refurbished is the word. I got a Ultrastar DC HC520 (12 TB) with zero hours from eBay for 130€. I guess it was originally intended as a replacement but was never used then and just collected dust. So basically brand new hardware. Sometimes you can even catch one that has still manufacturer warranty. One i saw had 5 years left on it.