I bought some of those Sonoff BASIC smart switches off Amazon and flashed them with Tasmota. It’s a pretty painless affair, the programming contacts are right there on the board, and the case comes apart with your fingernails.
What you’ve got to watch out for are idiot sellers on eBay trying to game the system by selling garbage cheap items amongst their real products to rank higher in the listings. Look at this rubbish…
It’s not £1.99… the £1.99 item is something you can’t even buy, the real item costs £9.29.
So what costs £1.99?… A bag… That you can’t buy…