http://www.alleypets.com/ After considering the MMORPG and the main site (which are both custom coded) how much could this fetch?
It is worth however much a person is willing to pay. Now if you were making money from the site, then you could probably work out how much it would cost. I really don't know the appeal towards MMORPG sites, but have you tried selling the site, just to see how much you can possibly get for it? Or selling the script as stand-alone to someone?
A good estimate on how much something is worth would be about 10 X what you make monthly from it. This can very because there has to be a market for it and people have to be interested.
Don't you need to register and play the game in order to evaluate? It is hard to determine with. Traffic, value of the code, and monthly revenue are the things you have to look at.
10 times what you would make from it in a month, or a little more depending on the potential of it expanding
you cannot know an exact value - until you actually finish the deal. You can try selling the domain name using sedo.com or similar websites. However I would not recommend that. You also got many website estimation websites - which many times are not exact. In the long run alexa rating is definately something to consider as far as domain name value. As far as package value of how much the actual "work" is worth - the people are right, about 10 times the monthly income of your website. Do not be confused between profit and revenue though... Good luck.