Am I allowed to promote stuff I sell here?

Hey guys! I've been collecting MySpace band and clothing brand memorabilia for about 10 years now and I rotate my closet fairly often. You can check out my collection insta @Catastrophecollects

I'm currently selling this Psychedelic Wear Get Crunk shirt size Large, it's an old hot topic brand. Shirt's from 2010. Beautiful condition, does fit slim. I have a ton of positive reviews on my integrity as a seller in my highlights on my collection insta page!