I think some folks mix S Gauge things in with their O, so, if you are an S Gaugian or happy to find things close to scale, Outback Toys is full of S scale farm equipment and vehicles of all types, plus buildings too. They note the scale on every item and go as big as 1/16 scale to 1:87, but not one thing that is O gauge or close. So, if you model farms, or a pick up truck dealership, this is a good source. outbacktoys.com
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