Area 51

Looking for some advice. I have an old Alienware Area 51 case from 2004 which I'm looking to sell. It has old not very good components in it (I've removed the HDDs ), but I feel like the case is still in good condition and might be of interest to someone. Where would be a good place to list this...

I was wondering, if one were buying a Titan series card, what would be the uses for it? Because I have seen people purchase Titans to game at 4K, but also to do stuff like rendering. And also, in any scenario, can one justify the cost of purchasing a Titan series card?