New to EBay finding listing process very confusing.

I presented American Girl programs monthly year round for 14 years at my library so I have an extensive collection of dolls and accessories used for display only. Now Iâ€™m retired and planning to relocate to Pennsylvania so Iâ€™m selling my collection. I thought EBay might be a good venue but Iâ€™m finding the listing process very confusing.

For instance what does EAT-RARE mean? Most of my items are retired and many are NIB ( I got that one! And OAK too!)

any hope for me? I also joined some collectors sites and have come across a site called Vendoo. Is that a reliable site?

Thanks for any help!