In the market for an out-of-print vinyl original of the Clash’s “London Calling”? How about a 45 of an old Troggs track?

Then head to the WFMU Spring Record Fair, being held today and tomorrow at Chelsea’s Metropolitan Pavilion.

The semiannual event is a beacon for record geeks, and this weekend’s show marks the New Jersey’s radio station’s biggest fair ever, with thousands and thousands of albums on offer.

But it’s not just old vinyl. There are new and used CDs in all musical genres, videotapes, posters, T-shirts and other music memorabilia.

Today, deejay Laura Cantrell hosts live music from Slaid Cleaves and Caroline Herring during her noon to 3 p.m. broadcast. At 5 p.m., Cul de Sac, featuring singer Damo Suzuki from legendary Krautrockers CAN, will perform a live set.

10 a.m. to 7 p.m. at the Metropolitan Pavilion, 125 W. 18th St., between Sixth and Seventh avenues. Admission is $5. For more info, check http://www.wfmu.org.