Question is are you buying or selling,,, if your buying as cheaply as you can buy it,,, if your selling what ever someone will pay for it,, but you wouldn't have any problems askin 1200 for it I don't think
MO tractors as a fellow Missourian, I will give you my guesses. If you are selling the 5100e is around $2000(it would be at least $500-$750 more if it was 4x4) The loader is about the same, $2000, if the hoses and cylinders are good and don't need to be refurbished,refurbishment cost is around $750 to $1000. If you are buying the package is worth about $3500 to $3750, In my humble opinion the loader is the highest value item. I gave $1200 for my B219 and spent another $750 on rebuilding the cylinders and replacing the hoses.
The only other advice I would give you is if you want a small tractor with a loader, I think a 4x4 is a must.