Id have said the same. Nothing worse than a salesman/woman putting pressure on. I used to see this sort of stuff everyday and pressure very often loses a sale. I very much doubt they were timewasters if they were there for 3 hours.

Its human nature to want to shop around for a few days to look for a better deal, is it not? I assume you 'asked' them if they wanted to buy today? Typical sales talk, that most say yes they want to buy today, to secure a btter deal.