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Um, well, it was Brutius who took your coins from Haven. Leaving 22,000 (or so) gold behind. At least, that was the plan. The point is that they're from Haven, and for Gordian, it's like some kind of relic that shouldn't be lying at the bottom of the sea. And a few other similar considerations. Including the fact that they earned these coins together. Otherwise... 22k went into the ocean. Of course, I also wanted to profit from this, but this is one of those cases where you can come up with many reasonable explanations, in my opinion.