You can find a cheap iPod Touch second generation on eBay, which is the most common place.
No, at about $430.00 USD, for a second generation new, it is about the right price. It is too much for a used first generation, and too cheap for a 3rd generation.
You can purchase cheap H2O Audio Products online at Amazon. You can also get cheap H2O Audio Products at Swim Outlet and Price Dumper. They all have several different H2O Products that are great for use while around water.
Inexpensive audio test equipment can be purchased from a variety of stores. Some options for purchasing cheap audio test equipment include Sweetwater, Amazon, and Test Equipment Depot.
Amazon.com
The best deal on audio books on CD would most likely be on Amazon which has great deals on electronics. They have not only a cheap initial price but cheap shipping as well.
Cheap home audio systems are best bought online and installed locally at a specialized shop. Check www.ebay.com or www.amazon.com to check out used ones.
Cheap Trick Unlimited / Big 3 Records
Your local Wal-mart has plenty of them.
A cheap microphone will have less sensitivity than a studio condenser microphone.
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You will probably not be able to find cheap car insurance if you have a bad driving record. It will be very hard to find it.