Yesterday I had a chance to use The Rack Workout Station at work. I really liked this versatile dip station. It's lightweight, compact, sturdy, stable and foldable. The Rack is a perfect companion to a doorway pull-up bar. I think it's a good piece of equipment if space is really tight and also for office environment where you can "deploy" the rack and make it disappear in no time. I read few threads here where it's dismissed as a junk by people who have never owned or even tried the rack. It even made it to the "Workout Equipment Hall Of Shame" thread. I find it to be far from the truth. BTW, amazon reviews are highly favorable for this product.
The rack is about 25" wide, 15" deep and 34" high. The round tubing is 1.5" in diameter. The dip handles are about 1.75" thick. The frame parts are welded and kept together by bolts and nuts. It seems to be pretty heavy duty for home use. This is a pro version and weighs about 30 pounds.
It's sold on amazon for $110 with $39 shipping:
Here is the link to the company site: http://www.rackworkout.com/
My understanding it's more expensive to buy directly from them. Other online retailers might have it cheaper.
Here are few pictures of the rack station:
Variety of grips for push-ups
When folded the rack can be used as ab wheel as it has wheels (obviously)
Thread: The Rack Workout Station Review