I've never asked for or been asked for an invoice. I can understand a business buying from a business for bookkeeping purposes, but what are you expecting an invoice to do for you in a private sale? Protect you from fraud somehow?
Invoice, or not invoice ?
Time to time i buying staff at other popular audiophile online platform. Always asking sellers for invoice to pay them and newer was refused till last time when I tried to buy $100 piece of cable. Before I used to buy lots of staff with invoices by my first request. What’s your thoughts, do you avoid deals with no invoice?