None in shops, and only on in trades (No price listed-it's being sold as a set with the other pirate plushies.). I'm curious about how much I could sell it for.

For any of the pirate/islander items, I would recommend finding a current selling thread and finding out what the general selling price is per point. I've found them going for about 7k per point, so that would put the plushie at about 5.25mil.