The problem with pricing the gold watches that high is that this is still a gadget. Next year the $350 watch will have better specs and in my eyes be "better". They will need to
Have a trade-in program or upgrade program of some kind for this to fly.
The gold version is not like any other product that Apple sells. It's not for regular consumers. It's not the Mac Pro of Macs. It's a fashion statement. It's for people who not only can, but want to spend a lot of money. If you need to know the price, it's not for you.
I don't think Apple expect to make a lot of money on the gold editions. Instead, they expect celebrities and rich people to wear them and increase demand for the other two versions. Those are the ones who will bring in the money.