Looking to start a cubimal collection? Common ones priced at 500 currents apiece.
One tier up, we've got uncommons for 1k. I have less on hand of each of those, but a plethora of chicks, pigs, butterflies, and batterflies. Find me in game if you're interested!
Many people give their common extras to newbies for free. It can really brighten up a new player's game. And get them hooked so they will buy the next tier up for currants. The whole 'first hit is free' deal.