I've been so bored when not home schooling my 4 year old that I've been building cars left right and centre using the carwow app. Been watching a lot of the carwow videos on YouTube too. They are really informative, and that Matt fella goes into detail about real world pros and consNot true, especially on new cars which is why Carwow exists.
Also, I got 1% finance instead of 6%, with a bit of leg work, that saved my about 10k compared to what the garage was offering initially, and about 5k better than any bank.
Not as easy on used, but still savings can be made in the right circumstances.