Help?!? Sharks!!! (and turtles)

[Vegetarian fish nut]

Hi,
I recently purchased a used tank. Unfortunately it came with 2 red eared sliders and five iridescent sharks. I need to get rid of them because they will get too big for the 80 gallon tank. I'm wondering if they are worth anything or if I should give them away. The turtles are really cute, but I can't keep them.

 

[Laser]

I think the easiest solution is to take them to your LFS and they may give you store credit. A chain pet store probably won't take them. Otherwise, you could post them on craigslist.