Cost: $7 ($5 with postcard/any ad); $25 pre-admission Saturday 8-10 a.m.

Organizer: Chicago Independent Radio Project

What to expect: Plumber's Hall will be jam-packed with rare vinyl, CDs, DVDs, posters, crafts and independent publications.

Why to go: Several Chicago labels will have booths, and there will also be musical entertainment. On Saturday, expect DJ sets from Disappears, Mannequin Men and Alla, and live performances from Pretty Good Dance Moves and Maurice. On Sunday, Deia Does Dylan will DJ, and The Loneliest Monk and Judson Claiborne will perform live.

Additional info: That pre-admission fee gets you unlimited access all weekend long, in addition to the early-bird period on Saturday. Goose Island heads up the food and alcohol vendors.