you know the feeling, you buy some new clothes that take from 1 to 18 (for steampunk, ouch) dyes to color and end up with a lot of extras. PW is making serious coin on this scam. i made my most recent purchase from another member of the faction that was already the color i wanted.
getting red or black is ridiculously expensive when advertised in game, at catshop or AH. i have decided to not even try for those, even though i absolutely LOVE PhaeJade's black fairy dress. I have to be honest, the profit motive would be too great if i got 10 red dyes!!!
these extra dyes also take up space in your inventory or bank. i had 3 of mine for over a month and in the end just dumped the last two for well below market.