Overstock.com has excellent prices and large selection of memory foam products. Check out their memory foam page here: http://www.overstock.com/Home-Garden/Memory-Foam/2795/subcat.html
These have become available almost everywhere you can purchase bedding or sheets. You can find good prices at www.Walmart.com or www.bedbathandbeyond.com.
There are a few online stores where you can buy an inexpensive, new memory foam mattress. Two of these sites include www.overstock.com and www.amazon.com. The biggest cost obstacle to overcome will be shipping for such a large item. You can get a pretty good deal on a memory foam mattress at your local Sears.
You can purchase a Silentnight memory foam mattress from your local mattress store or furniture store that sells mattresses. It can also be purchased from an online retailer like Amazon or eBay.
The truthful answers is: "It's the thickness you are willing to pay for". One manufacturer I know of makes memory foam mattresses in three configurations: The top 2" of the mattress is memory foam, the top 4" is memory foam, and the whole mattress is memory foam. The price varies accordingly. Personal Note: If you can't afford a memory foam mattress, try a memory foam pillow. Awesome, especially if you're a "side sleeper".
There are many retailers that sell 'NASA memory foam' mattresses. In addition to one's local mattress store, one might also try purchasing a mattress from Amazon.
One can find a top memory foam at local retailers such as Walmart, Bed Bath and Beyond, AAFES, the NEX, and Target. One could also buy online at sites such as Amazon.
Tempurpedic is the most common brand name, the entire mattress is supposed to be made of memory foam. There are also many "Just as good" mattresses that try to name themselves something close to that. For example, Bob's stores near us sell the "BobOPedic" mattress. If you're googling for beds, just type in "Memory foam" or ask at the store where you are shopping what beds they sell with "Memory foam." Some stores claim they have memory foam mattresses, but what they really are is a basic foam mattress with a layer of 1-3" thick memory foam on top. Be careful when shopping. Sometimes those "Layered mattresses" are a rip off, as it's cheaper to buy a piece of ordinary foam and then throw a mattress topper made of memory foam on top of it. Some people don't like having a mattress made of 100% memory foam because they feel like they're "rolling out of a hole" in the morning (the mattress sinks too much around them) so, even if you plan on buying your mattress online, go to a good mattress store and lay down on different types of memory foam beds to really see what you like. Even better, if you have friends who have a foam mattress and will let you "Borrow their bed" for the night, do that.
A custom made mattress can be found on several sites. These sites include Create A Mattress, US Mattress, Made to Measure Mattress, and The Mattress Tailor.
You don't have to pay an arm and a leg for a good sleep. The mission of MemoryFoam.com is to expose the promise of memory foam to every household in the country.
Check the picture below for the most cost efficient
Yes, but it will sleep hot! Having a pad over a good memory foam mattress defeats the purpose of buying a good mattress set. You can use a mattress protector that has been specially made to dissipate the heat see your local mattress store for the paper thin protector.
You can find more information on memory foam mattress at this site: http://www.memoryfoammattress.org/ and when you are ready to buy Overstock offers shipping for $2.95.
Memory foam mattresses are becoming very popular, but you need to know what is out there before you buy one. Some of the mattresses are made with different material, and there are some that are much more expensive than an ordinary memory foam mattress. Don't buy the first one that you come across. Sit on the mattress and even lie on it to make sure it is the right fit for you. If you have a bad back, then a memory foam mattress may not be right for you.