I've experienced this several times now; someone comes to look at a job, seems interested, says he'll email a quote over in about a week's time? I'm specifically talking about the ones who do eventually quote, just wondering what takes so long?
I've also experienced other tradesmen who come in and say there and then "that would take me one day and cost £450". So it's possible... surely it's obvious to them after seeing the job how much they're going to charge, there's no need to spend several days considering it? Is it the putting it into writing that takes time?