Upload & Sell: Off
I think you guys are getting unreasonably bent out of shape about this. Please read the last paragraph - I understand the costs associated with design, prototyping and manufacturing.
I didn't have a specific number in my head - I am simply stating that I'm not sure $280 for a quickshoe and an arca swiss plate on a bracket is good value for me. I specifically stated that I am not claiming anything negative about Markins: I did not say they are price gouging, or have created a bad product (quite the contrary, I very much like the idea), or they shouldn't sell it. I am making an observation about the value it creates for me personally.
On the topic of the actual item in question, price aside, the design appears very nice and it would be an excellent travel companion since the ball head will fulfill its normal role and the plate is all you have to add.