As everything costs more today then it did yesterday, last week, last month, last year, etc., and as Diezel amps are so hand intensive in the building, it is only natural that they cost what they do.
Do not blame the company for this. This is happening all over the world in every aspect of our existance.
If you desire a piece(s) of gear, it will be less expensive to purchase it now then later, if that is possible for you.
If you are lucky enough to own multiple guitars, amps, whatever, and you have a desire for something newer, or different, you might consider parting with some other gear which you have amassed over time for the newer gear you desire. It can be easier to do then you think, if you think about it and find that some of the gear is just sitting there and that you really find that you don't use it, as you once may have thought.
, it is how the economy works. 
