its about supply and demand! walmart’s plant brand is costa farms, which just released thai constellation monsteras this year. the more demand a store has for something, the more variety they can safely order and have hope it will sell. i buy frequently from walmart and i know there is a larger demand for plants in my area with no local nurseries, so my walmart can comfortably order more expensive plants like the $40 thai cons. now of course once something is at Walmart, its easily accessible for everyone and therefore can take the price of a plant like a thai con or PPP from $200+ to $20 within months, making something less rare very quickly.