See title.
I constantly feel like any interaction with a sales person is just a big con. Whether it’s a car, insurance, an apartment, internet, or a specialty item that I’m interested in but not an expert on. I always feel completely lost and uncomfortable and like no matter what decision I make I’m making the wrong one.
This is a great point but just to add, if its a brand product you can get common issues that don’t crop up for 6 months (e.g. xbox 360’s red ring of death). So buy new but not on 1st day release, and do a quick research on issues people often have.