I got my first sunrise a 25C in 1984 it cost me about £80 but it was in prestine condition, last one I bought was another MM from crackle they were well over £100 until the last 10 years or so.
I need a model O and a model S to have the complete set
The last one was the M78F (minus clouds). The most expensive Sunrise these days.
That is the post war portable.
For prices
https://www.bvws.org.uk/auctions/search.php?s=Sunrise
Cheers
Mike T