Price is justified by the buyer. If you think it worth its price tag, then it is. Electronics engineering, especially if you want to push things to limits, is a very expensive hobby.
Simply usurers , They want to have cautive customers where you can move or change , due to all the corporations (CARTEL)have the sames prices. And if not, you see the replacement prices are expensive by example:
A transistor bipolar 400V 5A ,
Apportionment FARNELL : 15 € by transistor + 20€ of transport cost( Barcelona- Tarragona) less 100 km . Total joke = 50€.
Apportionment Asturia seller : 4 € by transistor + 8€ of transport cost( Asturias- Tarragona) 850 km . Total = 16€.
Apportionment Paris seller: 4,5 € by transistor + 15€ of transport cost( Paris- Tarragona) 1200 km . Total = 24€.
Finally the transistors(lot 10) i bought on China by 10 $.