alt.marketplace.books - join
Books of all types, for sale or wanted.
Low activity, 294 subscribers, Usenet

rec.collecting.books - join
Issues related to collecting books of all types.
Low activity, 515 subscribers, Usenet

alt.marketplace.collectables - join
All sorts of collectables for sale and wanted.
Low activity, 369 subscribers, Usenet

alt.marketplace - join
Low activity, 292 subscribers, Usenet

alt.books - join
Use rec.arts.books.* or alt.books.* instead.
Low activity, 230 subscribers, Usenet

rec.antiques.marketplace - join
Buying/selling/trading antiques.
Low activity, 400 subscribers, Usenet

rec.collecting - join
Discussion among collectors of many things.
Low activity, 406 subscribers, Usenet

alt.books.marketplace - join
Low activity, 62 subscribers, Usenet

alt.marketplace.books.sf - join
Science Fiction & Fantasy Books sought & sold.
Low activity, 79 subscribers, Usenet

rec.arts.sf.marketplace - join
Personal forsale notices of SF materials.
Low activity, 110 subscribers, Usenet