Any "transfer" service such as via zelle, paypal, or other similar services can have very high fraud rates and can be very risky.
I would personally not participate in a $5,000 trade with this payment method, even if I knew the person well and knew them to be honorable. Anyone considering trading with the OP make their own decisions for themselves.
I would prefer to split the purchase into multiple transactions for my own peace of mind as well. I am a registered business owner making a purchase from a corporate account, and fraud is bad for business.