How do I sell a website?

I hope this is the right section to post this.

I have a website that I want to sell and I'm not sure how to go about selling it.

The domain is registered with A Small orange, and the website is hosted there along with 2 of my other websites.

How do I transfer the domain (I think I can transfer it to my namecheap acount for 8 dollars and then free push into another namecheap account..)

How do I transfer the website content/databases?

What do I do if a problem arises and I transfer the domain and website, but they say they can't get it to load, or the databases dont work or something? What protection do we both have?

As I said above sorry if this is the wrong catergory, but I couldn't find one more fitting.

james