Amazon offers the Noxzema Bikini Plus Shave and Trim Disposable Shavers 3-Pack for $2.00. Checkout via Subscribe & Save to drop it to $1.90. With free shipping, that's tied with our November mention and the lowest price we could find by $3, outside of the mention below. Each shaver features a protective skin guard that purports to minimize irritation.
A close price: Walmart has them for $1.97 with free in-store pickup. Also, be sure to cancel Subscribe & Save after your order arrives, or you'll be billed for subsequent shipments.