what is the going price for new shims ? and price for a used shim ?
I've gotten $7 each for used shims.
Retail from Yamaha is $14.45 each, best price I've found from a Yamaha dealer is $9.51, but they charge you 10% of your order in shipping, ie: you buy $500 worth of valve shims that would fit in a $4.95 USPS Priority flat rate box, and they charge you $50.00 shipping.