Tell us what you've got. A couple of photos and a rough description per item is plenty to start — we'll reply with whether it's worth sending and roughly what we'd expect it to fetch.
This form has no backend yet — see the note below — so right now it opens your email client with everything filled in. Review it and hit send.
Once that's wired up for real: a reply within a couple of working days, saying honestly whether what you've described is worth sending, and if so, what to do next.