And not to bash anyone, but I wouldn't pay $400 for a kit! Nalioth has it right, I have my builds done and have two left to build and I never paid more than $100 for a Romy kit.
If you buy a flat $20-$30, the bending jig +/-$300 and a couple other special tools $150 then you are able to make your own. Parts kits are around $300 or more now. It is not too hard to build one, but it is not like an AR by any means.
Not bashing here either, but under $100 for Romy kits are a thing of the distant past. The current market is at least $350. They are not as available as they used to be since no more are being imported like the good old days.
All matching numbers fetch a premium.