Sra solder sells them for 5.49 with shipping youcan also get them on a certain auction site search t-k tip for cheap im talking 5 for 4.99 with free shipping from hong kong they clean off about 10 to 15 chips a piece but lose thermal conductivity quickly
Item #: 300424897429
they probably melt Jk
I'd rather spend the 30 bucks on five than have to be ordering those all the time