FB Marketplace ? If they are still available in a few weeks I might hit them up on my way up north. That's a fair deal for them. I had a place I could buy them for $30 each a few years ago, they now want $50. I have 21 of them now. IMHO - the most efficient way to process and store firewood outside of a firewood processor. I only touch my wood twice and the second time is putting it into my OWB. Of could you need the proper equipment to move them around with.
If I was a betting man I'd say they are 330's. The 275's typically look more square. The 330's being 6" taller and the same footprint, typically look slightly more like a rectangle. Just my scientifically derived conclusion!