I live in CA in the US, and I asked 10 for AX-7 on some stores, here are prices:

2cooltek.com
ThermalRight AX-7BS: 10x$29.00 = $290.00
Ground shipping $16.90
Total $306.90

Newegg.com
ThermalRight AX-7: 10x$28.00 = $280.00
Fedex Express Saver $ 20.96
Total $300.96

1coolpc.com - FREE SHIPPING!! All U.S. Orders Over $50.
ThermalRight AX-7BS: 10x$30.00 = $300.00
Shipping Charges: $0.00
Total: $300.00

Plycon.com
Thermalright AX-7: 10x$28.99 = $289.90
Fed-Ex 3 Day: $23.50
Total: $313.40

You can check these sites for more opinions, or I can help with group purchasing, or ask someone who lives in the US to help ya~
Whatever, check these sites first =)