need help please re 1 cd i have and also where to sell my queen cds ans lps

Unfortunatley I am having to sell my queen music collection most I have put on ebay but I think ebay not that good is there any sites you can recommend but I have a cd and it is doing my head in I carnt find details I think I bought it in a wrong cover case it says on front queen greatest hits with all band pic bar code is 077778950424 but the cd is Gold and says lc0299 biem/stemra made in Austria then there is also these numbers 724383126422/724383126521 and queen greatest hits 1

It could be a case of wrong disc in case. There was a double release of greatest hits 1+2 and the discs were gold you could have one of them in there. Hope this helps