Though it may be short on veiled belly dancers, Yusef's does manage to cram in hundreds of fresh, frozen, canned, bottled and dried supplies your regular grocer would never dream of stocking in a thousand and one Arabian nights.
Like bulk packages of powdered sumac and Jordanian zaatar, a classic spice combo of thyme and sesame seeds used with pungent olive oil for warm pita bread dipping (Yusef's offers a nice selection of oil and various ethnic breads, too). Or kadaifi, shredded phyllo dough used to make Middle Eastern desserts just like Aunt Arpina used to whip up.
In fact, it's doubtful there's anything Yusef's doesn't carry in the way of hard-to-find North African and Middle Eastern culinary components -- except, maybe, bleating, ready-to-slaughter lambs for shish kebab.