Make different room types available with different prices for the room types

Well the way it works in 7.2 is that you attach a registration to a product, so if you have different room types as different products, then it already works the way you want (with different prices even). You can also have these different products on the same product display and have it still use the appropriate registration fields per type you have associated them with.

Basically what I'm saying is, please elaborate on what you're wanting that isn't already available.