That paintjob is absolutely incredible. If MR can come anywhere close to that, this piece will be a HUGE hit.
FWIW, the later runs of the clone helmets improved considerably. My Special Ops helmet paintjob isn't that great, but the paintjob on my Star Corps helmet is literally perfect. Most of the Star Corps helmets turned out very nicely, which indicates that MR learned a thing or two from the first few batches. This may be why the Star Corps helmets were the last announced, but the first to ship.
That being said, replicating a Fett paintjob of this calibur simply isn't possible for a mass produced piece. Hopefully MR can get something very close to this for $1,000 or less. That seems like a pipe dream, however.