In fairness, I often take a mate that knows more about what I am buying than me. If he/she as an owner and user of the same brand, reckons it's a good deal, I pay cash there and then. Nothing sinister, just bringing a (good) advisor. At the end of the day my decision to buy or not, but having a bit of good advice may swing it either way. It is far better than buying blind and then cursing .....

Just my take on this, no diifferent to taking a mechanic when you buy a second hand car.

Take care, Matt