Phong must be feeling the recession. He sells these from his website. If he is willing to sell it for $3,500 that is certainly better than his usual price, which is outrageously inflated. The movements are usually genuine (or modded gens) & he does use a number of gen parts. But, until you receive the watch (and even then), it is impossible to tell exactly what is gen, what is modded aftermarket (made to look gen) & what is aftermarket since he sells everything as gen.
I can tell you that the 1570 movements can be had for around $1,400 +/-, the aftermarket case for another $1,200 or so & the remaining parts for another $300-$400. If you do not want to have to search & construct the watch yourself, it is probably a good deal for $3,500.....assuming you are getting what he is describing.