what's this pretty coral?

[BeachVacationer]

And what's a reasonable price for it on Craigslist?

Thanks!

 

[JustinM]

It looks like a fungia coral, short tentacle plate. I don't know the price on CL, but my LFS sells them for between 60 and 120 depending on the size and color.

 

[inthedeep2]

looks like a mushroom to me

 

[TangingOut]

Hairy mushroom. $10-20