They've announced prices for the full loaded expensive models. And they're expensive. The entry level models are coming later. Elon said an X will be about $5000 more than the equivalent S (https://twitter.com/elonmusk/status/639170376186990592). So if they release a 70D version it will be about $80,000 before incentives are taken off.
The price has been known for months? At least for the initial cars, which are fully-loaded and thus a lot more expensive than the base model. Tesla has said for quite a while that the base model is going to be a bit more than Model S.