I bought a Savage 24 on the EE quite a few years back, in 30-30 over 20 gauge. I took one shot with it and the 30-30 didn't go off, light primer strike.
The second shot was a 20 gauge target load, front handguard came off, and the action opened lol
I took it to the gunsmith, he told me it's good the 30-30 didn't work, the rifle was so unsafe. He also found all kinds of cracks in the buttstock, and rust in hard to find places.
Oh and of course, it wasn't the seller's fault, he told me a good cleaning would fix everything and most gunsmiths are just negative people. This was the only time I have ever left negative feedback.