The Super Tinker usually goes for between $15 and $20 at my local Wal-Mart. That's in the grey box from behind the counter. SAKs are almost always less expensive in the clamshell package. The lowest I've ever seen them was $9.95, the same price as their Classics but they only had one left. I can't ever seem to go ammo shopping without picking one up.
I bought 4 clamshell Deluxe Tinkers at Bass Pro that just HAD to be mis-tagged at $9.99, blew off the Griptillian I went in to buy for that purchase. Kept going back for more but never saw them that low again.