OP, I think checking Craigslist is a good idea. Just add up the value of the parts and workmanship and make sure it looks like a good value. In my opinion, the $700 one you posted is NOT a good value. It looks like a freezer that might be worth $100, and maybe $250 of other parts. The workmanship, for me, did not add another $350 of value.
Also keep in mind that even if you buy something you have to learn how to operate and clean the kegs, how to balance the lines for a good pour, how to find and fix the inevitable gas leak, how to clean everything... A keg system is not as fire-and-forget as a fridge, even if someone else builds the wood parts.
I completely understand not wanting to build something. I'm the same way, but I am also a cheapskate. I ended up building something super easy. And ugly. I just used an old fridge, and mounted the taps in the door.
The "building" part of this was drilling 4 holes and inserting the tap shanks. Oh, and I mounted the CO2 manifold to a board and hung it off a shelf bracket in the fridge. Very fancy, that. You could also just let it rattle around too.
I can store 3 corny kegs in this fridge as long as at least one of them is a narrow Torpedo keg. There is also room for a 1.5 gal keg on the back hump. If I didn't want the top shelf in the for food storage I could probably fit 1-2 more 5 gallon kegs in there, too.
This would be a disaster if it was inside, but since it is in the garage, the looks don't matter.
Good luck with your keg quest!
