Looking for signs in the tealeaves is risky though. For example, my doctors sometimes sends me text messages saying something like "Hello enigmaflare, your XYZ Medical Center invoice for $83.00 is due in 7 days. Please pay to 01-2345-67890123-00." It's not using salesman tactics, but a scammer could replicate that and collect the money himself.
Another example I experienced was a door-to-door salesman who say your home has been identified by the government to be eligible for a heavily discounted air conditioner installation. Our company is authorized to provide that. There's limited funding available so buy quick to avoid missing out. So it ticks all your boxes but it wasn't a scam and I did buy it and it really was a great deal. BUT I didn't trust a word the salesman said. I checked with the government myself, found their company from the list of authorized installers, and called them back through that channel to order it. That's that part people keep getting wrong. They don't go through another channel to re-contact them.
Another example I experienced was a door-to-door salesman who say your home has been identified by the government to be eligible for a heavily discounted air conditioner installation. Our company is authorized to provide that. There's limited funding available so buy quick to avoid missing out. So it ticks all your boxes but it wasn't a scam and I did buy it and it really was a great deal. BUT I didn't trust a word the salesman said. I checked with the government myself, found their company from the list of authorized installers, and called them back through that channel to order it. That's that part people keep getting wrong. They don't go through another channel to re-contact them.