It was out of adjustment and they fixed it. Blades are a wear item, you cut grass, you will need blades sooner or later. If the seller buys them now, you buy the next set later. Coils, who knows, maybe t needs them, maybe not. $650 for blades & coils, I'd be going elsewhere, too.
If you're afraid of saving $3000-$4000 you had better go buy a new one. No disrespect, but some people haven't got the stomach for a good buy.