Many of you here have purchased or sold websites here on SitePoint or other sites around the net.

I'm curious to know what you guys consider the pros and cons of buying and/or selling websites online.

Some places like Sitepoint use a forum system for selling, some sites are entirely dedicated to selling websites and you can purchase sites off of Ebay as well.

Of all these methods and experience you have had buying and selling sites what elements do you consider the most beneficial and which are the most detrimental? What features do you like and which do you hate? Whether it's the cost or customer service or effectiveness, I'm interested to know.

Your input is greatly appreciated and I'll be happy to discuss further the topic of buying and selling websites online. Looking forward to your responses.