Generally it is thought that running shoes should be replaced every 300-500 miles, depending on how hard you are on the shoes. Most serious runners will replace their shoes every 3-6 months. I personally try to stretch that out to a year but will notice toward the end of the year that I start getting injuries in my legs and feet; that's when you know that its time for new shoes. Even if you're not running 500 miles, you should replace your running shoes every year at least, because the materials will not hold up much longer than that for active running.
You can find running shoes at team red lizard in portland,this shop is great reliable and the running shoes there are outstandingly cheap so you will not have to spend so much money.
Sketchers are an affordable running shoe. Their better running shoes are normally around $80. You can check their website to find out their various price points.
Nike Lunareclipse are ok shoes but if you want really awesome running shoes you should check out Addidas running shoes. They have much more comfortable padding in the soles.
they are usually $50 or higher but they might be lower but they are very nice shoes
Motion Control running shoes are shoes designed to minimize and control how much your feet move while they are on. They have a built-in support system that protects your feet from injury.
The difference between running shoes and walking shoes is one of support and construction. Running shoes tend to be made with more support, lighter weights, and with more spring absorption, and flecibility in the shoe, where walking shoes have tremendous support as well but tend to be a bit heavier and more sturdy.
You can buy Mizano Wave x10 running shoes at http://www.shoebunny.com/mizuno/mizuno-shoes/mizuno-wave-x10-running-shoes/ They will cost you between $70 and $150 depending on which ones you buy.
get insoles
There are a huge number of manufacturers of toe running shoes, some of which include FILA and Vibram Fivefingers. No, it is not a good choice to wear toe running shoes for a marathon, as they do not provide much arch support.
The adidas running shoes are supposed to be lighter so they don't slow you down as much. Also, They let your feet breath fairly well. I recommend them.
Mephisto shoes are a very popular brand of running shoes, and they are specially designed to help lower in impact of the ground, making your body much more stable.
One of the best places to buy five finger running shoes is from the all-purpose website Amazon.com. You can also find these unique shoes on eBay.com - for a much better deal.