90 degree 2:1 reduction helical gear set!

[E-racer]

This is a set of steel Boston Gear 90 degree helical cut gears. This would make an awesome, quiet mid drive box or 1st stage reduction. Small gear has 12 teeth larger has 24. They are 3/4 wide with 5/8 keyed shafts. These gears are about $50 a piece online. I'd like $75 or trade for:
-Hyperion 1420i or any 12s balance charger
-Cycle Analyst standalone
-DH parts (brakes or possibly forks)
-Pair of new 80-100's
-Burtie's timing adjuster
-maybe some other stuff for my build... lmk what you got. Thanks!