Personally, I would never feel comfortable ordering from a vendor with zero feedback, regardless of the price. Not that it matters, but it helps prove my point: I've made about 15 orders on the markets in the past 6 months. I've yet to be scammed or ripped off. Every order has gone perfectly. knocks on wood Contrary to the popular belief on this sub, every order I've made has been FE. All I do is research vendors for hours until I find one that I like, then I pull the trigger. There are tons of very reliable FE-only vendors out there. If a vendor has thousands of sales and only 3 negative feedbacks, chances are you're in good hands.
So yeah, that's my thought on the subjct. Hopefully I don't eat my words now!
But at the same time a reliable vendor could always exit scam at any time. The Gift Shop for example: he was one of the best heroin vendors for quite some time. Many people trusted him until one day he just disappeared. It seems like vendors start acting sketchy before they scam though. Having problems shipping, lying, etc.