Meeting a Stranger to Sell Something: The Rules
Choose the location before you agree to a time. Once you have replied yes to "I can be there in twenty minutes", you are negotiating the place from behind, and the easiest answer, your own driveway, is the one worth avoiding.
There is a ranking of places, and it is not a matter of taste.
The location, best to worst
Best is a designated exchange zone. Plenty of police departments have marked parking spaces under camera, set aside for online sales. Search your local force's website or ring the non-emergency number and ask whether they run one. Nobody with bad intentions agrees to meet you there.
Next, the lobby or forecourt of a busy staffed business during opening hours. A bank foyer, a supermarket entrance, a gas station under the canopy. Cameras, staff, and people walking past.
Then a busy parking lot in daylight, with you parked near the entrance rather than the back row.
Worst, in order: a quiet parking lot after dark, a residential street you do not know, an apartment corridor, and your own home. If a buyer pushes back on a public place for something portable, treat that as information. A person buying a phone has no reason to need your address.
Who you tell, and the check-in
Tell one person the item, the time, the place and the buyer's profile name, before you leave. Not a vague "I am selling something", because the specifics are the part that makes a phone call useful if one is ever needed.
Agree a check-in. You message on arrival and again once you are back in the car with the door shut. Ask them to ring you if the second message does not turn up. A phone ringing in your hand is also, on its own, a small thing that changes how a meeting goes.
Bring somebody when you can. A second adult standing near the car doing nothing is the cheapest safety measure available and it costs one favor.
Cash, counterfeits, and the transfer that has not cleared
Count the money in front of them, before the item changes hands, every single time. Not in your lap, not afterwards. If counting cash in front of a stranger feels rude, the alternative is discovering the shortfall in a parking lot with nobody to discuss it with.
Look at each note in daylight. Feel the paper, check the thread and the watermark against a note you already had in your pocket. You do not need to be an expert, only to notice that one note feels unlike the others.
Instant transfer apps are the newer version of the same problem. A screenshot is not money. A notification is not money. The money is in your account, in your app, refreshed, showing as received and available, not pending and not processing. Wait for that while still holding the item. A buyer who gets impatient during that wait has told you something.
Messages that arrive before the meeting offering to overpay, send a courier, or verify you with a code are a different problem altogether, and the messages that are scams rather than buyers follow a small number of recognizable scripts.
When a buyer has to come to the house
Some items cannot leave on their own. A sofa, a fridge, a wardrobe. Getting one out of a flat without a vehicle is its own logistics problem, covered in selling furniture when you have no truck, and it ends with a stranger standing in your hallway.
Shrink the exposure. Have another adult in the house, visibly. Meet them at the door and walk them to the item rather than letting them wander. Put away anything showing your name, your bank, your keys or your medication. Do it in daylight. Prop the front door open while they are inside.
Give the address last, after the item, the price and the time are settled, and never before the meeting is agreed. A buyer who wants your address before they want the item has skipped a step for a reason.
Letting them test it without losing hold of it
A buyer wanting to test something is reasonable and you should let them. The rule is that either you keep hold of the item or the item stays put.
Powering on a device is fine when you are holding it or it is sitting on a surface between you. Handing a phone over so somebody can check the IMEI while they stand up is not, because there is a version of that where they walk. Bring a charged battery, bring the cable, and pick a spot with a socket if the thing has to be plugged in. Setting that up before you leave home is half of testing an electronic item at the handover.
Keys stay in your pocket until the money is counted. For anything with an engine, you sit in the vehicle during the test drive, and their license is in your hand before it starts.
The exit script
Decide the words now, because deciding them in the moment is the part that fails.
"Sorry, I have changed my mind, it is not for sale today." That is the whole line. It needs no reason and does not have to be true. You are allowed to end a meeting while everything is still perfectly polite, and using the exit early, while nothing has happened, is the entire point of having one.
Then go. Do not stand there explaining. Get in the car, lock the door, and if there is any doubt at all, drive in a direction that is not towards your house. Relist it tomorrow.
Act on these without debating them: they arrive with people they never mentioned, they want to move to a different location once you are there, they want you to follow them somewhere, or something goes quiet and cold in you for a reason you cannot name.
Sales not to do in person at all
Small high-value items advertised locally with your neighborhood attached draw the worst attention. Jewelry, gold, a laptop. If you are selling in that category and going alone, the exchange zone stops being optional.
Anything that requires a stranger inside your home while you are the only adult there. Postpone until somebody can be present, or sell it another way.
Anything where the buyer will not agree to a public place, will not give a name, or only communicates through a channel you cannot trace back to a profile.
If the buyer is not local at all, posting the item shifts the risk rather than removing it, and shipping instead of meeting in person trades a stranger at your car for a claims process you cannot see.
If a meeting cannot be made safe, do not go. Relist the item and wait for somebody who will meet you at the police lot.