When they first appeared on the market en masse, the going rate was $10-15 each.
Cree made a big push into the business with Home Despot, with Philips and Osram/Sylvania being the other large players. Ironically, the Cree bulbs were not reliable, and they've since left the market.
The first price breakthrough came when Philips introduced their "Basic" bulbs -- non-dimmable, plastic globe, etc. -- at around $5 each normal price for 60W equivalent, but the introductory price was $2.50 each. They were very popular, and all the ones I bought in 2015 are still in daily use. They've also been good for a classic drop light, replacing severe-duty bulbs, with no glass to shatter, and able to take some knocks.
All told, $2 each for a name brand is not out of line, though they can be found cheaper, and since the advent of the "filament LED" types, they can replace decorative bulbs as well, without looking out of place.