With the current circumstance, i guess its no suprise that the stocks are getting low and so price are getting high. 
To give a concrete example: the mamba stack is 20 euros more than usual which makes it around 40 percent more in price. On top of that sooo many esc are just not available, and props seem to go quickly aswell. Its making it very expensive now, let's hope it doesnt stay that way. Is this the same everywhere around the world?

Prices in the US seems to be more a less the same.

Yea I don't see any movement in prices so much here in the U.S. as there not being any movement at all ... like very few new products coming in. The TBS Tango Pro is one that I keep seeing that seems to be stuck in preorder forever.

Radiomaster will be stuck forever too.

I haven't noticed prices going up. Some items seem to be out of stock or unavailable, but not near everything. In fact, I just picked up an FrSky R9 Module (NON-Access, NON-2019) complete with a R9MM receiver combo for $50 (US). Yeah, it was a little hard to find. I think people are buying up the NON-Access components. Since my primary interest is sub 250g quads, I don't really pay attention to parts for the bigger (over 4 inch) quads. So far there is plenty of inventory and prices do not seem to have inflated. In fact, I find sales and discounts more than you might think. Yeah, I sometimes pick up slightly older gear on close out sales.

NOTE: At this point, I have been a little reluctant to buy from Banggood, but I know a lot of people do. 

Where I buy:  Amazon, PyroDrone, GetFPV, AirBlade, Cyclone FPV, and sometimes (cautiously) eBay.