You could find cheap but supportive running shoes online at ebay.com. Ebay will offer many running shoes that are quality shoes and will be able to help you out.
You can find cheap designer shoes in a lot of places, but it will depend on where you live. Here is a great website that has a variety of cheap designer shoes to choose from: www.ideali.com
ASICS is the leading manufacturer of running shoes, wrestling shoes, volleyball shoes, tennis shoes, soccer boots, walking shoes. You can find more information in http://www.asicsamerica.com/
If you are looking for cheap DC skate shoes in the Boston area you should go to the site 'dcshoes'. There you can enter your city and find the next shop where you can buy cheap DC skate shoes.
The best place to find relatively cheap running shoes would be an outlet mall. You would be able to try many different shoes from different manufacturers.
You could find real cheap running tennis shoes at amazon.com. Amazon is a great website that will offer cheap products to customers. Also you will be able to compare prices.
Amazon?
Famous footwear that's where I go to get my tennis shoes and they were $55.00
You can find cheap running, jogging, and walking shoes just about anywhere. Walmart is definitely a good place to find cheap shoes. Another place would be Target. Two other places could be Marshalls and TJ Max.
A good place to look to find cheap Mizuno running shoes is at the following website: http://www.trivillage.com/Mizuno-running-shoes-clearance-men.html
You can find cheap, casual, men's shoes at just about any retailer or online. Sears, JCPenny's, Walmart and Amazon are just a few places you can check.
Cheap shoes for children can be found in places such as TKMaxx and Walmart. They may not be of the highest quality sometimes but they do the job well and the shoes are grown out of before they are worn out.