Man, there used to be a place to get them even cheaper than that. I want to say I got something like a dozen pads for like $25-30 plus shipping, and I could even mix and match what grits I wanted. I'll have to dig around to see. The prices provided in that link aren't terrible, but I know I wasn't paying nearly $4 a pad. If I find the link, I'll see if it's still active and post it.

bowlingbeat.com has a 20 pack for $44.00
you can email him after the order is placed and mix/match grits
been using him for years, fast and reliable

I think [url]http://supergrit.com/products/products_discs-abralon.asp{/url] still has a good price.  Might depend on quantity and shipping though...