It's your money and it is your right to look as long as it takes for what you want. If the sales person is doing there job they should be happy to answer all of your questions. If you tell them that you want time to look it over they should give you private time to do that after which they could answer your questions. The problem is work ethic. Most want to make money without really having to work for it. They just want your money and will not even thank you for it. I spent 39 years in sales and I just can't stand to see the way sales people perform their jobs in today's time. Most will not even return your call.