I agree that the starting price is fairly high, but it doesn't take a business gurus to figure out that people are buying "ported/ hotrod" knock offs on ebay for double the price of one shipped to your house, so why wouldn't they charge more? Maybe they could do a knock off of the "barf box" that looks to add 150.00$ and 5hp to a saw.
Waiting for an OEM builder might be alot tougher then most people think ,(at a reasonable price )and alls you have to do is cruise the wanted and for sale adds here or any site for confirmation of that.
The assembled saws are pretty good quality from the ones I've used and seen so as they have gotten better it just might be that were going to be paying more.