My bank's only option for the amount that I need to send is a wire transfer and not sure the counter party wants to share their banking details with me for the deal. Is venmo ok for an amount $15-20k? Looks like it is within the amounts of venmo. Purchasing something, I actually already have it and they are going to give me the title and a bill of sale once I complete payment, so I can register it.

Don't have any concerns with this counter party and they are comfortable with us as well.