How to sell built Lego sets? I have 4 UCS Star Wars sets: Slave 1, Airspeeder, TIE fighter and Sandcrawler. I'm not interested in keeping them anymore. They take up a lot of room and don't do much.  

I was wondering how to sell them: Ebay, Craigslist?  

Any suggestions would be good. Also how much do you think they are worth (built)?  

I have all of the mini-figures and no pieces are missing. I have the boxes and instructions.
If the sets are indeed complete with all parts, minifigs, instructions and even boxes then I'd recommend Bricklink, as the collector community there would be more appreciative of these features. Whereas on Ebay and Craigslist you'd find more people who just want a playset and couldn't even tell if a set was complete or not.

For higher value sets (like yours) and for the european market I'd give Catawiki a look as well, as their reviewer and escrow system helps avoid scams and other pitfalls - for a higher fee for both buyers and sellers.

For price suggestions check these links below:

Slave I
Sandcrawler
TIE Fighter
Snowspeeder