There's no one-size-fits-all answer to this question, as the funniest way to introduce a high-end sticker to an art market will vary depending on the art market in question. However, some general tips that may be useful include, creating buzz around the sticker in advance by posting about it on social media and other platforms, arranging a showcase or presentation where potential buyers can see and touch the sticker, and giving away free stickers to people who are interested in purchasing them.