I’ve owned an M900, B7K,VMT and an SS, all good, not for me, I didn’t mind the second hand price point.
I think they are of a decent quality, but the sound was not for me.
The key in this is the price point.
The 500w amp is £50 less than the 900w amp new, albeit with a better functioning DI and a headphone jack (no aux input).
Looking at Apple whatever the price start point each incremental jump in price significantly changes the screen size or memory capacity, but the base model is a few hundred below the top model.
Would you expect to pay roughly the same price for a 1 litre car compared to a 2litre turbocharged vehicle?
I think there needs to be a differential between products and not just re-hiking the M900 price back up again.
Regarding cabinet price, we may all eat our hats and it may completely blow everything out the water at the same price range, if it does, it is worth the cost, but where it has set itself it almost has to.
I may be wrong, I am not a commercial success at anything, but more than anything I think the ire generated is about these things like or loathe the sound