Not sure what the prices will be for the passes.
Taken directly from Seat61.com website:
"The InterRail & Eurail pass ranges are streamlined and aligned with each other for 2019. The InterRail pass range for European residents and Eurail pass range for overseas visitors now virtually mirror each other in coverage, available pass periods, reservation requirements and even pricing.
Overseas visitors will no longer be forced to pay for 1st class travel if they buy a global Eurail pass, all passes will now come in both 1st & 2nd class, even global ones. A very welcome step forward.
The Eurail pass range is significantly simplified: The 2, 3 & 4 country Eurail Selectpasses are discontinued, leaving just one-country passes and global passes, as with the InterRail range. The Eurail global pass is being reduced in price to compensate for the removal of the cheaper Selectpasses and to align pricing more closely with the previously-cheaper InterRail passes for European residents, so this a real benefit.
Another welcome move, there's a new 'Senior' category of Eurail pass saving 10% off Adult Eurail passes for anyone over 60. On the other hand, Saver passes are discontinued, these gave two people a 15% discount on adult passes but they always have to travel together. This again reduces complexity.
The old 'after 19:00' rule for using sleeper trains with Eurail and InterRail has been replaced with a much simpler rule, see the InterRail or Eurail pages.
I've saved the best until last: UK JOINS EURAIL!! Eurostar joined the Eurail & InterRail scheme last year, accepting Eurail & InterRail passes with a €30 passholder fare with great availability. The UK has always been part of the InterRail scheme for European residents, but earth-shattering news this year is that finally after 59 years, the UK joins the Eurail scheme too! A Eurail Global pass now gives free travel for overseas visitors all over the UK as well as in the other 27 countries. There has always been great demand for this - how many visitors dropped the UK from their itineraries as it wasn't covered by their pass?"