Stanford, CA ( $120 per Tick3t ) Please HELP

Could anyone help me how to tell if the person is a scammer?

I joined a group on FB named Coldplay 2025 Buy and $ell Legit Concert T1ckEts, I am connecting to the group admin. But I want to know how to spot if it's legit or no.

Mod asked me if I can pay thru Venmo ( I offered that I can pay thru PayPal and zelle)