You can buy USDA prime beef again at the Reading Terminal Market for the first time since Harry Ochs went belly-up a few years ago.
Rib steaks in that class were on display this morning at L. Halteman Family Country Foods. Be forewarned, however: these are wet-aged steaks, not dry aged. The butcher told me they might go with dry-aged at some future point.
In case you're wondering, across the aisle Giunra's Prime Shop (one of two other butchers at the RTM) does not sell prime meats. Owner Charles Giunra tried that when he opened eight years ago, but found his customers wouldn't pay the price that prime beef demands. That said, Charles is a great meat buyer and while his beef is technically USDA Choice and wet-aged it's a very tasty, superior product.