Amazon has U by Kotex Click Tampon Super Plus Absorbency, 18-count Boxes (Pack of 4) for $6.08 each. This comes out to $1.52 per box.
Right now, they are an add-on item when you purchase $25 or more. So you can either add them on to another $25 order or you could place five orders (to get over the $25 limit) and have them shipped to your house.
However, if you place five orders, you
Pricing was current when the post was published, however Amazon prices change often, so please check before you buy.