Not to sure about Walmart but you might want to check out Freddy's
Shop small local stores
It's a matter of shopping in the right place, for the right things. A hobby store for the cars and a gun shop or Big 5 for the bb gun.
Your items are very specific, and considering what's going on in the country today, plus the fact that Walmart imports most of it's inventory from overseas. My advice look some where else
Walmart does have them but they sell so fast that if you didn't know they had come in then you won't get them
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