If you want the best Toshiba a laptops under 500 then the last place you should go should be the Toshiba or computer store like PCworld. When you go into a store they can charge what they want and tell you what you want to hear.
If you’re looking online, not only do you get a much wider variety of price and models but you also get a chance to find impartial reviews. So you’re not hearing how great a laptop is from the guy behind the sales commission, you’re hearing how good (or bad) it is from hundreds or thousands of users around the world sharing their opinions.
Once I have the best laptops under 500 picked out to review the first thing I do is look and see what other people say. There’s no point in looking at something which 5000 people have called poor quality when you can find one with everyone leaving glowing reviews. It’s obvious there which would be the best laptop under 500 or otherwise really.