If you submitted the zombie pirates one at a time, I would probably price them at $25 each to start.
So I uploaded one zombie pirate to see how things work at indiegamestock.
After six days of waiting, my submission finally got accepted and is now listed at the price of 10$... (i saw characters with only 6 animations listed for 15$ there!?!)
So if somebody is interested in this hot deal, just buy it at https://www.indiegamestock.com/details?i=516 for 10$ instead of paying 20$ at my blog (http://re-animated-zombies.blogspot.com/p/re-animated-zombies-zombie-pirates.html)
@ Ian: I tried to contact you via email - no response from graphic-buffet so far.