I don't know what you mean by "legacy" parts. By and large I'm just happy to be able to get parts for 40 year old stuff!! Needed a power steering line for a 460 the other day. Special fittings on both ends and about 19 bends. I was ready to get out the bender and the welder but decided to call our dealer instead. $138, available next day, and when we got it, it fit perfect, I didn't think that was too bad. Had a 1256 untill a couple years ago. Anything to do with the engine, injectors, crank, camshaft, was pricey, but all the rest of it was fine. I haven't priced any 2 banger deere or 20 series parts to compare, so I really wouldn't know about them. Don't currently have any AGCO, so can't really comment there either.