I definitly woudn't be too happy to see someone sell an Ultra Extreme Rare on which I invested my time to make fishing in my area worthwhile.
It would prompt me to put less design in rare fish as they could possibly end up making money for someone else

All in all, take great considderation on how this will not only affect the fishers (sure, you get to collect them all) but also the reasons why people make custom fish in the first place
