There a gentleman that has a case 644( thats what he says it is)for sale. He said it's all original including the 18hp motor. I thought the 648 had the 18 hp engine but maybe I'm wrong. Everything sounds good and looks like a new paint job. Comes with a blade, plow, 3pt digger. He wants $2000 for it. It's size would be great for some the odd work like cleaning out the sheep pen and it would look good with my 444. Going to check it out this weekend. Just wondering group consensus. A ridiculous price or good deal.