I've had to use Rated People to find a trader to do some work on my house, as I did not have any recommendations off friends and family. I have had 3 people come round for quotes. One was okay, but 2 were very pushy, saying they would get started right away as they had materials etc in the van. Er, no as I want three quotes. One of them, wouldn't take no for an answer and kept trying to find different ways of saying he would start today, right now in fact. Honestly, I used the word no as a complete sentence at least 5 times.
I know that traders can pay up to £70 to quote on a job so they are already out of pocket so they want to do the job. The business model encourages traders to be pushy.