IMO: I don't text.
I hate calling, but I will do it only to touch base with you on setting up the pickup.
I prefer email. I can ask more info about the pin and sometimes to get better pictures.
I don't put money down and only pay in full on pickup.
I have a seller that has went dark on me (no email, no callback) wanted to sell the whole group and will give him a couple more days. But it's his loss as it would be yours if I was dealing with you and this happened. My money would only go to the next seller with a pin I'm interested in. Money is still warm in my pocket.
Price is never "Firm". Just give it enough time and it will come down. Have seen people relist with price is "Firm" again and I just smile on that one.