I have an IHC from CMP in 06 and it runs like a sewing machine.Depends. Just looking for a shooter to learn on or a collector piece? I have only two, one is a DCM gun that is a late 5.7 mil H&R receiver with myriad parts, barrel is SA. Excellent rifle. Other is a CMP rifle that came to me via an auction site. SA receiver with new Criterion barrel and mix of parts and new stock.
Had to let Ted Brown work some magic on it to make it function but it does now and is a fun shooter too.
The only neg I have heard on the makers was avoid the International Harvester if possible. My brothers DCM rifle was such and even with some magic pixie dust sprinkled over it, it never really ran right. Others MMV on that one, no doubt.
I think most any old M1 with a decent barrel is worth having. Parts can be swapped out as needed, stocks too. Bedding helps them shoot tighter but for a plinker who cares?
Have fun in the search.