The drone is over 250g and under 900g, so it is C1 classified. I have requested the correction. According to the Federal Office of Civil Aviation (FOCA), such drone models are subject to registration or can only be flown with a licence. Further information can be found at: https://www.bazl.admin.ch/bazl/de/home/drohnen.html

Unfortunately, we already sold out our Black Friday stock with the reduced price.

Any sufficiently high-wattage USB-C charger will do. I personally use one from Minix.

Our pricing is based on a wide range of factors, such as the source of supply, the quantity purchased, the supplier, etc. The case you have observed also involves a price difference due to these factors. The case you observed is also a price difference due to these factors. We are always looking for the best prices so that our customers can benefit from the most attractive offers. As soon as a quantity is sold out, we have to go back to other suppliers. This creates natural price differences.