Gear that people may like to have around but not often enough justify the cost to themselves (so they borrow off mates).
Ideas of varying cost:
Bolting hammer and associated gear. (A follow on from Makita competition).
Etriers.
Surveying gubbins, distos, Z6 phones/pdas/otterboxes.
Pelicases
One of those knives ah147 showed us in his video post - trilobite.
Pulley jammers?
Foot jammers.
Basically anything that isn't in my gear stash
I recently just bought a stitching awl for fixing gear and some tigerseal and theyrrrrre grrrreat!. Maybe something like this could make a small prize for someone aquasure might be better. ~?20/?25?
For group competitions bulk quantities of mallions/krabs, or a handful of oversuits/or helmets may be appreciated. In fact some of the above items may be preferable (survey/bolting gear) if the club has a regular gear cycle of common stuff anyway. What use would 5 helmets be to a small group when you bought 20 less a year ago for example?