Einstein Bros Bagels 13 Bagels for $6 on Mondays! ...Einstein Bros Bagels prices are cheap, but it will cost more if you order a lot of items. Their classic bagels cost just $1.15 while the Gourmet is set at $1.80, and a box of a dozen bagels is priced at $14.65. A half dozen in a box costs $8.75, an egg sandwich breakfast meanwhile, costs $4.89.