I saw a nice B drill with small seedbox sell for $950 a few months ago. It was nice though... It was field worthy. Tires were good, seed tubes were good, had all of the drag chains. Only thing that needed attention was the step boards. They had some dryrot issues.
Only downfall I saw was the single disk openers, but the bearings seemed good in the and the disks were in good shape.
Were all Deere drills with small seed attatchment fitted with single disk openers?