This may be old news, but today I saw two brands of injector (single-edge) razor blades at Wal-Mart for the first time. They weren't on the shelf, so I don't know if they're a regular item, but rather on those hanging strips. A 7-pack of Schick blades was marked at $5.64, and a 10-pack of Gem/ASR blades were about $4. Too bad I don't have any single edge razors!
This is a very big YMMV. My guess is that the Wal-Mart I went to (in FL, an hour south of the Tampa area) only has them as a test run, possibly because of the demographics here (yeah old folks!).
A final find at Wal-Mart included a 2-quart crock pot for $8.54, if you're into that, but that's a little too big for me (still looking for the ever elusive cheap 1-1.5 qt lather warmer/crockpot).