Yeah that is a pretty good price, there is not much difference between the 85 & 86 Master's slightly different knurling on the rear dropouts/standers, so the forks would be fine.
The thing is, sometimes things go for silly money, I sold my Nos Chrome 85 Master F&F a few years ago for about £340 I think, the good thing is there are loads of them about, so just keep watching & you may pick one up for a good price
Just remember if your buying from the US you will have to pay shipping & maybe import duty
Good Luck