OutletPC via eBay offers the Arctic Silver 5 Thermal Compound, model no. AS5-3.5G, for $5.95 with free shipping. That's the lowest total price we could find by a buck. It's used between CPUs and heatsinks to increase conductivity.
NCIX offers the Cooler Master Hyper 212 EVO CPU Cooler, model no. RR-212E-20PK-R2, for $28.95 with free shipping. That's a buck under our mention from two weeks ago and the lowest total price we could find by $5. It fits Intel LGA 1366 / 1155 and AMD FM1 / AM3+ processors.