We're glad to have you aboard. Take some time to look around the various subforums and let us know what model you may be intetested in. I can't say that anyone here will be willing to part with their Mossberg, but I'm sure we can help you find what you're looking for.
We can definitely help point the way to a new Mossy! Some one had an 835 for sale, dont know if it still is or not... Buds is a good place to look and I have some friends over at WTF Guns and they have usually got decent prices too.