Dog Bed, Crib Mattress: Po-tay-toe, Po-tah-toe

So like I said earlier I will explain the crib mattress.
I have found that several Great Dane owners and lovers recommend a foam dog bed. The giant breeds have joint issues later in life and investing in a good quality dog bed will make it easier for them throughout life. 
After reading this I (being the planner and list maker I am) swiftly went to Amazon to look for a foam/therapeutic dog bed. Success! Well actually initial small amount of success, the small dog beds were reasonably priced but the sticker shock set in as I clicked the drop down menu for the sizes. 
$200?! (not including shipping!!!!) I was floored. 
I searched everywhere and I kept finding exorbitant costs for a dog bed in the size I knew he would eventually need.
Then I came across a comment on another Great Dane site (Honey the Great Dane, love her site very informative, RIP Honey) one dane lover said she uses baby mattresses!
EUREKA!
It's the perfect size for a full grown great dane and guess what the price is for a firm foam crib mattress?

go on guess...

$25. Yep that's right only $25 for a great Serta mattress! On Amazon with free shipping for orders over $35 so add in the fitted sheet and BAM!! affordability! 

This is the one I bought.   

PRO TIP: This bed has a laminate cover (great for puppy accidents and easy cleanup) and in the reviews one customer said it doesn't make that awful crinkle sound :)