[$3.50, Patina]
These mints promise that your sex life won't be the same, so if that's a good thing, pick up a tin for $3.50 and got to town.
More life-changing finds for under five bucks after the jump:

Hey, look! A magazine that doesn't suck! It's intellgient without being pretentious, sharp without being mean, well-written without being superflous, and original without too much cooler than thou bullshit! And it's free! Well, you can order a free sample from their website, anyway.
[free, Radar Online]

Peanut erasers!
[$3, Kikkerland]

This is such a cute idea — the "matches" in the matchbook are actually herbs to grow in your garden.
[$5, Doe-sf]

[$4, Pearl River]