I want to buy an Alienware laptop (I live in Europe) but the prices seem very inflated on eBay.

Like, European sellers are literally asking 500-1000 euros for a broken or outdated laptop that would be 200 euros if it was HP Omen, Acer Nitro or any other brand.

Why are Alienwares more valuable than other laptops?
And how do I get a 13-15 inch Alienware for cheap?