mwave offers 1.5 grams of Arctic Cooling MX-2 Thermal Compound 5-Pack
, model no. MX-2-1.5-5, for $3.99
with free shipping
. That's $0.53/gram and tied with last month's mention as the best per-unit price we've seen for this compound. (It's a current price low for this quantity by $23.) This compound offers high thermal conductivity and low thermal resistance to dissipate heat efficiently from CPU / GPU to the installed heatsink.