Actually, it depends..
If you can and want to build your own - as in BYOAC

- and don't want to count the hours etc., not worth, not nearly! A new hobby? Build Your Own Arcade Machine?
If, on the other hand, you just want a good looking machine the easy way ..Go for it!
Sure they made it for 400 ..but then again, that's probably just the parts. Add a reasonable something per hour for all the work you'd have to do (and then add all the money for the equipment needed) and it might even seem like a bargain? And, are they offering any guarantees? How's their return policy?
Still, it's your money..