I read somewhere once that some people basically charge $0.10 per gram on larger snakes to figure out a price, so if you are looking to sell based on that price style (completely up to you but this is how I might do it)
I would take that $150-$200 and add that to (1000 x .10) and I come up with a price around 250-300.
just a theory, for higher value animals I'd probably charge more per gram but I don't really know how the market is when it comes to adults and sub adults as far as price range