what is the best monoprice maker upgrade for $25

I bought a monoprice maker select because it was on sale (my first 3d printer, so excited!) anyhow I just happen to also have a $25 visa gift card, I know it’s not a lot, but whatever. I was thinking about getting a second reel of filament but is there any upgrade I can purchase for $25 instead? http://ift.tt/29iKVEj