Here is a deal that might require a little bit of work.
Staples has 12 packs of Sharpies (Ultra Fine or fine point) assorted colors for only $3 shipped!
It will say on sale for $8 and then there is an instant $5 off coupon making them only $3 and Staples is shipping FREE on all orders!!!
It took me several tries, but I was finally able to order 2 Ultra Fine point packs for $6.25 shipped! It will say out of stock, but for some reason they keep adding stock every so often, so just keep checking back if you are interested in this deal. We use sharpies a lot in our house!
Go here to see the deal.