There´s nothing rare in it (i don´t know the condition of the items), but for it´s volume i would say it´s worth more than the 175 €. And there´s some good stuff on the singles section.
As a collector i even collect VHS, but make sure you´re willing to spend real big money if you want to start collecting Queen. It´s like feeding a monster. It never stops!
P.S- I gave it a second look, try search the net for different country releases (different covers, etc), since the guy don´t specify, i supose it´s the normal versions.