I'd be interested in them doing a tear down of a FIPS 140-2 Level 3 or higher hardware security module. Basically systems designed to self-wipe on detection of tampering.
To OP, those devices are not cheap - they run $22k from SafeNet (dependent on what model, obviously). In addition, FIPS criteria is meant to be tamper evident (not tamper resistant). SafeNet does require a special key to recover after a tamper attempt, though: http://goo.gl/RyVtFj
Credit card readers get scored on how hard they are to attack, and pass above some threshold based on difficulty of attack and time taken.
Level 3 wouldn't be a problem, that's tamper evident really. Nothing is tamper-proof for an attacker with physical access, resources and time. You're looking at Level 4 for even any kind of real serious roadblock, but even then...