Guild Wars 2

Does anyone have any idea why the fractal rare weapons that are just called
(dagger, greatsword, rifle……) sell for alot more than regular rare weapons.

I see some with sell orders 4g+ and buy orders 1g+.
Whats the deal with these, cause they look like just green/blue skins, so stats are unique but they are just rares.
Do they have a higher chance at precursors or something

like this? http://www.gw2spidy.com/item/37297
the first thing I notice is this: Supply: 2, Demand: 192

compare that to a normal rare greatsword: http://www.gw2spidy.com/item/27573
Supply: 109, Demand: 91

then there’s: http://www.gw2spidy.com/item/37302
Supply: 0, Demand: 251

quite simply, these are so rare that they are desirable. possibly as investments. (I know I’d like to buy it at 3g and sell it at 10g!)