We can do a strip search before exiting town
step 1, char drops EVERYTHING they have on them before
step 2, char picks up a set of items to proof they have nothing on them.
cap with chip amethyst (to give base str char extra str to equip quilted armour), quilted armour, 1 wand, 1 buckler, one ammy, 2 rings, sash glove boots,
5x spears or 2*8 items
Thsi will ensure they are completely clean
step 3. pick up items they bought. it would be clear if someone item cheated