In the bottoms of those seed hoppers are little spinning shaft/cups/picks/flutes/ depends how it's set up but they carefully pick small seeds and drop them out the bottom. They need to be clean and the shafts turn easily. Any pitting rust or rough bearings or frozen bearings decreases the accuracy and ease of use, or could result in broken parts if the rust isnt knocked loose.
That green thing on the side is the mechanical lift I would guess? It has a chain or maybe gears inside, if it sat in frozen water it might have sometching busted which is real hard to find parts for, or at least rusty and stiff and might need to be taken apart, greased, and put back together.
The wheels would run that green thing as well as the seeder shaft, so I don't know With rust anything working 'as it sits' or that for sure all parts are there. With the wheels removed - why, was something broken and it never got fixed? How many of the delicate parts and bearing are in the dirt below?
The seed hoppers again, if they have a hole rusted in them from all this time in the open, the small seeds run out. Not good, need to clean them out and inspect carefully.
Somewhere in the dirt, with the wheels removed, are a few, or maybe many, parts that spin and turn and need to run right. I'd be concerned that they can grease up and work smoothly.
Those cast iron rollers in back have value, and shouldn't be hurt. That will be a worthwhile part even if everything else were totally shot.
The seed hopper covers aren't attached. I want them to fit and work smoothly, if some of the brackets are messed up or they don't fit square it lets dirt and water in, lets seed blow or bounce out. With these small clover, alfalfa seeds, they are very spendy, I can't afford to be 'close' I need a seeder like this to work very well and accurate and smooth. Can spend $400 for a 60# bag of alfalfa, the tool needs to preform just right or it is costing more than it's worth real quick!
These are the things I look at on this implement, and others you are showing too.
The stuff has value when it's all there, all together, has been greased, and can see that it was operated in the past 12 months and is working. Then I can take it home and use it.
When it's a rusty pile of pieces and 'maybe all there but I can't spin or test anything' then it is really just a pile of iron and worth scrap iron plus 10%. This item has some value in those cast iron wheels; but if I buy it just for parts then I'm going to need or sell 2-5 of them and sit on the rest for a long time before selling a few more, my money is tied up... So it would be worth whatever 2-5 wheels bring me, no more. Salvage value. Salvage value is always about scrap iron plus 10%......
Most farmers pull old broken equipment out into the tree line or the pasture and let it set there because it's not working any more. So I see what you have and I'm going to assume it's all broken down and sitting there abandoned for a reason. Something is busted or worn out past useable.... Maybe the stuff was good shape and dad just couldn't keep up with it and with illness and all it got left out in the open, but I don't know that, as a buyer in going to assume it's old busted wrecked stuff. Just how buyers are gonna view this.....
I do not know if you plan to work on these items and bring them back to running shape if possible, or are you planning to sell them As is where is, nothing done to them at all.
Since you are not real familiar with farm machinery, it might be difficult for you to bring them back from the dead, as they are. I don't know?
As with military equipment, there is a big difference between a pile of rusty parts, and an accurate, reliable machine made of those parts.
The value of these items will reflect their status.
Everything is in pieces or sitting deep in the dirt with the bearings very suspect.....
So, the question is which way are you selling them, as is or are you gonna fix up and assemble and make smooth working what you can?
That is why it is real hard to put a value on your items. We can sure help you identify. But value? Yikes that is a dart throwing game, mostly you have a pile of iron, with a little time and effort you might have some nicer items but they are still old and worn and depends on the local market if that stuff is still used there..... It's very hard to guess value depending on how you are going to sell them.
For my money that seeder would have been the gem, if it is all there and cleans up well that would be the most valuable thing you have. But it also is just iron right now, the way it sits so much a lb plus 10%...... The offset disk could have some real value too, if the bearings are all good, the lift works, etc,
The JD disk I wouldn't spend much time on, is what it is.
The IHC drill and the yellow thing depends how bad all the many bearing are, worth fixing if they just need grease and effort, not so much if they are froze up solid and needs parts.