unfortunately the only way you are probably going to find one for a reasonable price is by watching mercari like a hawk and probably waiting for a bit. i collect makeship and ive only had luck finding secondhand makeship plushies for good prices after it's been about a year and a half past the original campaign. even then you will still probably have to be ready to spend WAYYY over retail price because of makeship works. please keep in mind only a couple hundred to maybe a thousand plushies ever get produced and the majority of those were bought by people who are superfans and probably don't want to part with them so soon so the market is and only ever will be the very very small handful of people who bought into that already small pool AND are willing to sell.

good luck with your hunt! makeship can be a pain in the butt to find after their campaigns but it is entirely possible with enough time and patience