except they are seedless varieties...
Super-sweet varieties marketed at "boutique" prices, yep we have them here, too... our local grocery stores (both Giant and Wegman's) have had 'Moon Drop' and 'Cotton Candy' grapes, but I haven't seen 'Witch's Fingers' aka 'Tear Drop' yet. And yes, they are $5-6 per pound here, too. Even ordinary seedless grapes can be $4 but can usually be found at $1-2 per pound.
Similarly, the stores have discovered they can get $2-3 per pound more for 'Honeycrisp' apples. We love them, but we're not often willing to pay the premium... they are a special treat, like those extra-tasty pinkish 'Cara Cara' oranges. Mostly, our apples are whatever crunchy kind I can find in the 5 pound bags at Wegman's (75 cents per pound is hard to beat, especially since our local orchards are charging "boutique" prices, even by the bushel).
