What makes a great gaming store?

I was thinking what would make a good game store. Corporations have diluted the personal touch you used to get at games stores of old. The local GameStop of EB Games (now the same company) tend to have the usual, low paid, teens at the counter. They usually know some games, but don't know much about the more obscure games.

Most of the stores make their living off of trade-ins. The trade-in value is extremely low becuase they know you are at their mercy. Markup is usually 100% or more on consoles, and I believe games are close to that. Take the GameCube for example. The trade-in value is currently 10 bucks, but if you go to buy one it's usually around $75. Not that anybody wants one anymore, but parents looking for a less costly alternative to the more popular systems find these prices quite attractive while purchasing them. I wonder if they feel ripped on when trading them in? What's more, who is setting the values for trade-ins? Is there a blue book for them?

I think 3 things are key to a game store:

1. Knowledgeable staff. They still exist! Gaming is so mainstream now, most don't smell. The customers experience must be that the people know what they are talking about, and are excited about it.
2. Selection. Games, consoles, accessories... you better have them.
3. Demos. Being able to try out games before you buy them is ciritical. Everytime I read a good review still always wonder who wrote the review and if they like the sames things I do about games. Being able to try a console is another great way to help make your decision. I hear many people tell me they don't like what they ordered online. Well, don't be lazy and go try one out before you drop four or five hundred.

What else would make a game store better?