Dude. Duuuuude. This place is absolutely IN. SANE.
I just... I can't get over it. Jerry's was the first record store I visited in Pittsburgh and I seriously thought, "This is it. I've been to the record store to end all record stores". It's hardly EVEN a record store, much less a gigantic warehouse stuffed to the brim with all things vinyl related.
Things I love about Jerry's:
Great for everything before 2000
Amazing prices
The sheer quantity
Wide variety
Things I don't really love about Jerry's:
THE AMOUNT OF RECORDS HERE IS JUST SO OVERWHELMING OMG
No new releases
The environment/atmosphere - super musty
That being said, if you go to Jerry's, either plan your trip to be at LEAST an hour long or know exactly what you're looking for prior to visiting. I've only gone here a few times and every time, I spend the first half hour staring dumbfounded and confused. Really, just go to the back and look at their aisles and aisles of 45's. Absolutely absurd.
Addendum: Make sure to test things out on the turntable they have there! I've picked up some records that have been quite scratched (still playing it and loving it). Also, they are CASH ONLY, so make sure to prepare accordingly!