In everything of electronics I buy new. Second handed is a risk with such fragile components. And if you buy new you can buy the newest stuff.
Offcourse for people that are short cashed it isn't easy. For them I always recommend the budget ones like for instance the Mini 4K that you can buy in Belgium for 259€ (non fly more) at some local stores.
It's better to buy a good budget then a second handed higher level drone from an unknown seller.