Only my
.. I would ebay the unwanted stuff. A little more of a pain in the rump sometimes than just dumping it at a swap style sale but usually more $$ will come for it. If you insist on selling it out of your home however, 2 words. Yard Sale.
As for letting visitors in, I never do it unless I've known them for quite some time. Not really worried about stuff getting stolen, I just don't like strangers wandering through my house. Too many other problems can come with it. With respect to the Mrs, after everyone is gone, you still have to live with her.