Happened to me the other day. I got a weird feeling when they responded with a long message within seconds of me messaging (maybe it’s partially automated?), then when they wanted to pay upfront with Zelle and asked for my email I knew it was a scam.
At that point they’d send you a fake Zelle/Venmo phishing email, saying you need to upgrade to a business account, or “login” and do something else to accept the payment.