So, how old is too old for a camera? When the photos you get are no longer usable. Until then, it's good.
Just dug up my grandfather's old film cameras.
One is an old Zeiss Ikon medium format with a Tessar f/3.5 lens and a Compur-Rapid shutter. It shoots 120 film in 6x9 format - that's a huge negative. My grandfather used it for years, along with his old Kodak Retina I 35mm. He shot only B&W back then. The Zeiss has a yellow filter that clips on and off the lens.
I calculated that if I take and get the negative's developed and scanned, I'll get 36MP images back. That's a lot more detail than my DSLR's can do. And that means excellent 24x36 prints.
Here are some photos of them. I just started shooting the Kodak, but haven't ordered film yet for the Zeiss.