First let me say welcome to OfferUp. Take the time to navigate and find your way around the forums where you will find amazing and useful information. While in the forums be sure to join the conversations, ask questions, share, hand out a kudo or two (thumbs up), earn badges and enjoy.
You have received some good advice. How long have you been trying to sell these baseball cards? Are your pictures good quality?
@goblinNo worries... I just had to attempt to tease you.
You speak the truth.
Household items and collectibles move slowly. I deal with estate items which is a combo of collectibles, vintage, and slightly used/new items.
I am in the slow lane but I am happy here for now.