I've been trying to find a decent CB400F for more than 20 years. It's nostalgia - my late brother had a 1976 model in Parakeet Yellow. His girlfriend had a Candy Antares Red 77 CB400F, which was my first regular rider when I graduated from dirt bikes to street bikes in the early 1980s.
Around here at least, any CB400F that comes up for sale at a fair price is sold in no time. But I got lucky last weekend and bought a 1976 in Parakeet Yellow. It has 36,000 miles and it's not 100% stock but it's close. Although it needs some TLC, it's in quite good shape overall and it runs like a new one.
I don't have the time these days for a full restoration like I did on my 1975 CB550K. But this one really doesn't need it. I'll work away at the cosmetics and enjoy riding it this fall. Then over the winter I'll do some of the bigger projects. It needs a head gasket and likely a few more things. Should be fun!