Amazon has the Kershaw Cathode 2" Speedsafe Knife (1324) for $13 with free shipping on $25+ or with Prime. List price: $30. It's made with 4Cr14 high-performance steel and features a reversible pocketclip, finished with a stonewashed finish.
Has average Amazon Reviews.
Amazon has the Ardwolf Fingerprint Keyless Entry Door Lock (4331021217) for $179.99 - $32.40 off with coupon EFSROTJW = $147.59 with free shipping. Features intuitive OLED touchscreen that walks you through the process, storage for 256 fingerprints and 300 user-defined 4- to 12-digit codes, double verification mode, entry tracking, 2 mechanical backup keys.
Has above average Amazon Reviews.
Amazon has the SureFire Sidekick 300-Lumen Keychain Light (SIDEKICK-A) for $30 with free shipping. List price: $62. It features a 3 light modes, 45-hour max runtime, and up to 66m light beam distance.
Has good Amazon Reviews.