Craigslist or eBay. You would get better prices on eBay probably, particularly if you live in an area where they could be easily picked up (large enough population that someone near you would be interested).

I'll second what palimpest said. I bought several of my appliances off craigslist (high end ones) and got them for an amazing deal and they were new (not boxed) but unused. Saved about 4K on my 2 ovens. You will probably be able to make more money on ebay. However, keep in mind that they still are 8 years old and chances are people will not be willing to pay what you may think they are worth. I hope I'm wrong but just be prepared.

Where are u located? I am interested..

7 year old appliances? You'll be lucky to get 20% of their original cost anywhere. Ebay will net you more, but be more of a hassle. If you don't need the cabinets either, you might contact Green Demolitions and get more for the package deal and at least keep things out of the landfill.

I'd put the whole kitchen, as a unit, on craigslist. It's an easy layout to work with, and the whole thing could likely be plopped into a new space pretty easily. It's a pretty nice looking "before" kitchen.

I just sold my 20 year old builder grade golden oak cabinets for $1000 on Craigslist. There was something like 22 cabinets + 20 year old electric cooktop + electric oven.

Yep, craigslist or Ebay local pick-up only.