By the way, if you are picking up crappy old records, you're probably going to need to clean them. Here's directions I stole from somewhere: To give your records a good hand washing, start by preparing this wash:
1 gallon distilled water
90 ml 70% isopropyl alcohol
1 gram Alconox (a laboratory detergent)
Also, get a natural bristle brush and trim it to the correct stiffness/bristle length so that the bristles can get into the grooves but aren't stiff enough to scratch the record.

Lay the LP flat and pour a thin coat of the above fluid on it. Brush the wash into the grooves with the bristle brush. Brush in the direction of the grooves, going through all grooves. Flush the wash and dirt off with cool, running tap water. Rinse the record with distilled water and pat it dry with a soft, clean cotton cloth.