Storenvy.com has nice squishies from different shops. You just search "squishies" they also have other things too. Tootookawaii.com has squishies but they're a little higher in price but only because they're mostly rare/hard to find. Pinkkupcake.com also has squishies for GREAT prices!! :)
Most all Squishy Shops claim to be the cheapest. Your best bet would be to compare prices of the items you are interested in to determine which costs less.
The dollor store
A thrift store or used furniture store would be the cheapest.
it depends from store to store.
the cheapest place you should look is at the drug store
You can get the cheapest stair stepper at pricegrabber.
in the dollar store's
Walmart
squishy and colorful squishy and colorful squishy and colorful
you can make a squishy bun with alot of things: you can make it with your own squishy clay that you can make with houshold items, you can use amazing mold putty, you can use sculpey mold maker, or you can use bouncy putty/wonder dough which you can buy at dollar tree or any dollar store in your area. You can learn how to make the squishy buns with the materials above by searching YouTube"how to make a squishy bun out of (the material you choose to make it out of)."
Buy they at a grocery store!!!!!!!!!!!!!! -- Stealing it would be the cheapest way.
ice land is the cheapest food and drink store
The cheapest place is the 99 cent store