I'll even say that it's not that all blacks are like this, there's a selection factor for personalities who would even seek commission/sales type jobs. But the blacks who end up in these positions are the absolute worst.

It's the most uncomfortable experience. The entire experience feels like nothing but a black guy trying to deceive you for an extended period of time while pretending to be friendly. Yes, there are white guys like this, but I honestly believe that upwards of 85% of blacks I've dealt with in this situation are awful. I imagine that whoever trains them advises them to find optimal times to push a sale or maybe even take little liberties with the customer. But blacks seem to interpret this to mean "try to take advantage of the customer literally any time you can do it and still retain plausible deniability". Who knows what they are doing to our elders that deal with them and don't know any better.

I'm unfortunately a bit passive in normal situations like this, but with blacks, you have to show them right off that bat that you're watching how they move.