New car - advice for selling replaced accessories?

Hello,

I just bought a Crosstrek Premium and immediately added or replaced a bunch of parts/accessories. The standard floor liners/mats and cargo tray are junk (I replaced with LASFIT ones). So I'd love to offload the original cargo tray and carpet floor liners to someone in need. I also have a Covercraft sunscreen from my previous 2008 Outback that's in decent shape.

Any advice for selling these? Currently have them on Facebook marketplace. Any other sites/apps you'd recommend? Should I post in a Subaru forum?

Thank you for your help!