Amazon has Cooler Master High Performance Thermal Paste – (HTK-002-U1) for $1.50 with free Prime shipping. No minimum.
https://www.amazon.com/dp/B0009PT…PDKIK
Select no-rush shipping at checkout to receive a no-rush shipping credit.(Spend $1.50, get $1 digital credit)
https://www.amazon.com/dp/B0009PT…PDKIK