The common response on here is that because of the subsidy of the service, any kind of offer at any time merely increases that subsidy, and because each berth is subsidised, increasing the number of berths (e.g. more rolling stock) merely increases that subsidy.
It has always seemed to me when in year 5 or 6 of new rolling stock they presumably hope will be going in 20-30 years time, that largely sold out, no opportunity for any change, improvement or expansion of what is at face value a very successful (in terms of tickets sold as a % of tickets available) service for all that time, and all we can do is hike prices above inflation in order to further suppress suppress demand and manage the inadequate capacity we do have .... , is a rather sorry state of affairs, but that has been discussed ad infinitum in other Speculative Discussion topics.
As a interesting comparison (and ignoring any change in the service quality between the Classic Room in the Mk3 and the Classic Room in the Mk5, which I would suggest is quite limited from the customer perspective), I believe Bargain Berths were still available until the end of First Scotrail operation in 2015 (albeit, very few of them). Being charitable and accounting for solo occuopancy, £38 then would be £50.59 now, adjusting for inflation.
Perhaps more comparably, the Classic Flexipass equates to £200/ticket now. There is a thread on here from 2012, which suggests the price then was £119.40 per ticket
I might think of buying one of these - they give you 10 first class journeys on the sleeper for £119.40 and given that the cheapest single is £138 I might be tempted. I will be going on the Fort William line in Oct and also to my parents in Aberdeen twice so seems a good investment. My...
www.railforums.co.uk
Adjusting for Inflation, £119.40 then would equate to £173.01 now, so the ticket has increased 15.6% above inflation over those 12 years.
Who knows what the next 12 years will bring .... !