Counterpoint Research now believes that the upcoming Galaxy S20 flagships will be part of an upward trend in Samsung's phone sales that began with their S10-series predecessors. Furthermore, the new phones' performance in the market could re-energise the uptake of their category in general. This may be based on the strength of the S20s' price and specs.
https://www.notebookcheck.net/The-Samsung-Galaxy-S20-series-will-outsell-the-S10s-according-to-a-prominent-analysis-firm.453547.0.html
$850 sounds about reasonable...but $150 for just 5G would be a total ripoff.