Amazon has the the Thames & Kosmos 620381 Remote Control Machines: Farm Science Experiment Kit for $23.59 which is the lowest price it’s ever been.
its more of a building kit but has the ability to educate kids in a way about different farm equipment. I have been eyeing for some time and am not sure it will go lower. Hope it helps
https://www.amazon.com/gp/product/B07B7S3KW5/
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