That's because this isn't normal inflation
This is supply shock inflation. If vendors are selling something that is in short supply due to chip shortages, shipping difficulties, covid shutdowns of the Chinese factories etc. etc. they can raise their prices because supply is limited.
It isn't worth worrying about this, because it is only a temporary condition. Once the supply chain untangles (which may not be soon but will happen eventually) these inflated prices will slowly work themselves out of the system.
We see the same thing with oil prices all the time - something happens that limits supply for a time causing prices to spike, the oil companies are making bank, everyone complains and talks about price gouging. Then whatever limited supply gets fixed, someone else makes up the shortfall, etc. and slowly (much more slowly than the rise) the basic laws of supply and demand force that price premium out of the market.
They will not be able to charge these 30% premiums in the long term, so if you can afford to wait, do. Not only will you pay less later you will hasten the day when that happens.