Once money has moved, your position changes completely. Everything below should be settled before, not after.
The property
The seller
The money
Never pay in cash, and never pay a dealer's personal account. Pay the recorded owner, through banking channels, with a written receipt.
WHY THE BANKING CHANNEL MATTERS MORE THAN YOU THINK
Undocumented transfers are not recognised by civil courts in the way a documented payment is. If a dispute arises later, cash paid through a relative is extremely difficult to prove.
Routing through a Roshan Digital Account also protects your right to repatriate the principal and any gain when you eventually sell.