@bd139.
I fully understand your view point but the sad reality is that yes, the seller might be relying on the income of the sale, that is not in dispute, but its the buyer that makes the journey, and they are the ones being stopped and in some cases issued with fines. Gumtree etc have done deals with couriers like UPS, Hermes etc to give special low rates during the lockdown and they are themselves promoting that don't go out of their way to make unnecessary trips out of their local area to control Covid-19. If the collection point is within your own locality, then you could combine it with a trip to go shopping for instance, that way you're not likely to be stopped by the police and if stopped, say that your on your way to go food shopping.
I have done this a few times myself, both locally on a shopping trip, being socially aware and safe and out of my local area, paid for a courier and electronically paid the seller, thats both quick and safe to do so with buyer protection built in as well.
@factory.
Yes, I already have this schematic and the good article by Mark Hennessy, and it is very similar to the KKmoon unit but some circuit values have changed and I have not reversed engineered mine to see if the circuitry is the same but just doing a simple count up, have 7 caps on mine, Mark has 6, mine has 17 resistors, Marks has 16, and I notice that Mark says the FS8205A is shorted by solder blobs, mine is not shorted so yes, its close but not spot on.