If you're looking for bicycle stuff, I'd say it's worth the drive. Or you could try your luck next weekend at the Big 3 swap meet next weekend at Qualcomm Stadium. If you go to that one, wear some comfy shoes!
The Big 3 swap has everyting. I don't think I'm going this year, but I've gone before. Admission is free, but they charge for parking. Starts Friday at noon.