Just migrated to shopify payments from PayPal
I sell a basic B2B service and negotiate add ons based on the customers budget and requirements
I cant find a way to receive adhoc payments - i could give someone my paypal address and receive payment
An item has to a shop listing or a shopify invoice?
This is a real issue if its the case
You could create draft orders and the customer then receives the invoice with terms to pay so they checkout through Shopify.