What are your opinions of Sim Audio amplifiers?

Sim audio, make great stuff as well.
  Not heard any bad reviews about sound, build, etc, .....some of their out of warranty repair, Has been a pain in the butt, read over at audiokarma, or another audio message board, I’ll try to look for it.
but, like any high quality item, you will pay a little more.
BMW, Jaguar, any top tier brand will cost a little more.
   You sure make up for it In looks, sound, and bragging rights!
:)

It's not just Sim though, lots of manufacturers have engaged in rampant price escalation over the years.

Yes, I notice that too.  High end audio gears price have been going up at rate that seems a little unreasonable.

If you look inside some of the high end preamps, there are not much stuffs inside that justify the high price.

High end gear can be considered Veblen goods, like some other luxury goods, the higher the price, the higher the demand.  There is an exclusivity created by higher prices which is something a large segment of the population value. I wouldn't say the price hikes are unreasonable, since they need to keep up with the pace of wealth growth at the very top.  If you really want to have an interesting discussion on economics, this probably isn't the forum, but I'd argue the price hikes are necessary for companies like Sim Audio et al. to maintain their status as luxury goods.  The 888 monos I mentioned previously are the direct byproduct of the explosive wealth growth of the worlds millionaires and billionaires.  If you can get past your concerns over owning something exclusive, and recognize the influence of cognitive dissonance, you can make better decisions on gear.

I like Simaudio may get 330a amp to power my new speakers Motion ESL. Well plain and simple gear is going up insanely is because manufacturers figured out if we are willing to pay $2k for a power cord than a $15k amp is reasonable. This mark up is what they feel they creation  is worth in the market place not the actual worth of parts, labour and R&D. Enjoy😃

Transportation and Raw Material costs are though the roof.
Supply chain is a mess no matter what you are manufacturing.

This will all play into global inflation. Things are going to get real crazy.
Just try and buy lumber, building materials, supply is short and prices are high. Higher than Giraffe ....