The problem I have is. When the original seller claimed he can measure cords to number of bucket fulls IF he is grabbing it from a large stockpile.
If he is grabbing the wood from already stacked piles in individual cord stacks, then it doesn’t matter what it looks like on the trailer.
I run a loader at a gravel pit feeding a crusher. It has a 8.5 yd bucket. We also have on board scales. A full bucket averages 14 tons. In the course of 100 tons loaded, each individual bucket can very by 3-5 tons at times. My long winded point is, loader bucket size cannot be a used for measuring sale-able products. Especially with something like firewood. That’s how landscape companies make so much money on mulch and topsoil.
I drove a dump truck for several years and you have to account for moisture. If the dirt is wet or dry is gonna make a big difference in the weight, but the volume is the same.
Wood splits however are different then dirt, it can have more or less air witch will change the weight and volume.