If you're unaware, Hot Topic has the exclusive rights to all things Riverdale. Without a doubt, the Jughead Jones beanie has been the biggest seller, as have all other things Jughead. This makes me remarkably proud, since after all, the infamous crown was my first tattoo (10+ years ago).
Currently Hot Topic is running a fantastic promotion: spend $30 or more in Riverdale merch, get some free Valentine's Day Cards!
Personally, it's not hard for me to spend $30 on Riverdale merch. They come out with new things every week. The Valentine's Day cards are simply adorable, and each card sounds like the characters they have on there. I haven't downloaded the music yet, but I'm sure it's awesome.