For me personally, working there was a perpetual moral internal debate. I was good at convincing people that were on the edge of buying. On one hand, the more you sell, the higher the commission you get, for you and the whole team.
On the other hand, you have to sell tech that is one of the best, but for the time being, totally overpriced. Therefore, you have to manipulate a lot, and tell half-truths if not blatant lies at times, which is not great either.
This becomes much harder when you have to manipulate a person, that is clearly struggling in their decision because of financial reasons, into buying a phone priced 1000+ euros.
On the inside, I was always screaming "what in the world are you doing!"
The way I operated was this: when a manager was nearby me, I had to act the part, but when I was alone I tried, in a not so explicit way, to clear the fog in their brain and make them get back some reason in their heads. I prefer being able to sleep at night, instead of getting a few more bucks in my check.
To be clear, I like Apple products, and I personally own them ,because I was able to get them used (but brand new) with huge discounts in price, but they are not for everyone.
About the 40yo man, he gave us back his phone each time. The way it works is this: if you bring back a phone, you get an evaluation which is at best (even in perfect condition, got out of the box just a week earlier) half of the initial price tag.
You can get a new phone, give back your old one and pay the difference.