As much as somone is willing to pay for it and you are willing to let it go for.
Mediasharks.com may be listed at $1,800, but that number is what the owner is hoping to get and it could have been anything. You won't get a good rough idea (if that makes sense) till it has been sold, and even then that will mean that there is just one less buyer looking for that type of domain name.
I like the name and I'm sure you'll find a buyer real quick, but it may not be the price you are looking for. I'd appraise it at in the low-mid $xxx amount.
well it seems like $xxx is a little low considering somebody could snatch up mediashark.com + .net + mediasharks and have a real corner on this name concept. i bought it in 1999 because i thought it had such a wide appeal with diverse potentials...