Fatty that's easy:
if(scores.equal) .4%
and(kills.equal) .2%
then(raise.value) 1
OR
if(scores.equal) .6%
and(kills.equal) .4%
then(lower.value) 1
Pathetically simple and completely wrong code method, but you get the point. Stick something like that in the arena scoring code and you'd get values that reflect usage over the past week. This way the vaules would change, but not fluctuate so often as to get someone peeved. The value of an aircraft would reflect what happened last week. Dynamically changing, always dead-on, and requires NO intervention from HTC unless things get horribly out of hand.
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Flakbait [Delta6]
Delta Six's Flight School (http://www.worldaccessnet.com/~delta6)
Put the P-61B in Aces High
"With all due respect Chaplian, I don't think God wants to hear from me right now.
I'm gonna go out there and remove one of His creations from this universe.
And when I get back I'm gonna drink a bottle of Scotch like it was Chiggy von
Richthofen's blood and celebrate his death."
Col. McQueen, Space: Above and Beyond
(http://www.worldaccessnet.com/~delta6/htbin/delta6.jpg)