I wouldn't use it for large transactions with strangers.
@CudaChick1968 is right. And to piggyback on that, for tax season 2023, you'll receive a 1099-K if you have $600 or more in revenue through PayPal, Venmo, and I think Zelle as well.
I sell more machines than I do cars, but the concept is the same. Large transactions are CASH transactions and I usually draw up a bill of sale and include my terms -- "as-is," "no warranty," whatever the situation calls for. Just be aware that Hollywood "prop" money is out there and looks pretty damn real if you don't take your time. It would be easy for someone to slip in a couple $100s and when you're counting a stack of 40 of them, could be easy to miss.