Best thing to do is ask the seller if you can sit with it for a while and play it. If nothing quirky is going on, all the hammers release and rebound, every note works, nothings getting stuck and you are enjoying playing it for maybe an hour, it may be worth it. If it hasn't been tuned very recently and still sounds good, its probably holding a tune. Sure, glued flanges come apart and you may need the occasional quick repair here and there, and at that age you probably will, so what. Minor repairs are not that expensive. Annoying at times, but the piano wasnt a fortune to begin with.
Of course, if your experiencing trouble right from the start, walk away.
I bought a 50 year old Baldwin spinet that was all original for quite a bit more than that K and C and enjoyed the heck out of it. Occasionally a hammer would block or a glue joint would come apart, but it played great and had a nice fast, light action. After a while the kinks were worked out. I restrung it and regulated it(while apprenticing with a tech, or else it wouldn't have been financially feasable) and although small, pretty and cheap, its still a joy to play.
I have another piano so I use it to play duets with my daughter.
So don't rush, try to see what you're getting and then decide.
Good luck.