Earphones are generally sold in electronic stores that also sell portable music players. Cheaper earphones often suffer from poor quality and may not sound as good or fit as well. Expensive earphones may have additional features to improve the sound quality such as noise cancelling technology. Cheap models may cost as little as $25.00 where the highend can go well in to the hundreds of dollars.
Walmart or Best Buy should have them.
I usually buy these on the internet, which is convenient but cheap.
Tigerdirect.com is a good place to see prices.
www.fragfestservers.com has good prices and their servers are good.
The best place to buy wireless earphones would be at Best Buy. they have a range of good brands in a range of prices for every budget. You could also find some cheaper ones at Walmart.
A good place to buy cheap Superfeet Green insoles is at an online website, preferably amazon.com. They carry the insoles you are looking for at cheap prices.
Gemporia is a really good place, cheap prices and quality stones.
Best Buy online does have good deals on laptops at affordable prices.
There are a lot of different places where you can buy cheap cameras. First, try going to radio shack or something. A lot of times Shop ko has good cameras for really cheap prices.
You can buy cheap post it notes on line from many stores. Many office supply stores have them in stock online for reasonable prices, would be a good start to check there.
Karmaloop.com Cheap Prices and Updated Stock.
To my great surprise, it would seem that walmart has this piece of equipment for you. Walmart has good prices, so it should be cheap enought for you like you want it.