The dreaded Marlin Jam is the #1 reason why 1894 is best bought new or already fixed when it was new. Fortunately the C wasn't my first Marlin so I knew what to do right after unboxing it but it also makes second hand market a bit of a minefield.If you go with a Marlin, google Marlin 94 lifter repair before shooting it the first time. Marlin has had a problem with lifter wear for years but the problem is easily remedied if you catch it before it starts wearing.
Not the end of the world even after it has jammed but it's so easy to fix beforehand that I'm surprised Marlin still hasn't done it at the factory.