Like Tim mentioned it play 20 records, A side only.
The US record companies stopped making 78's in the late 50's, Canada a few years later, and South America and the Middle East & India iinto the 60's.
78's are still available, my problem is finding an ebay seller that knows how to package them correctly to ship. There are also repros available of the Big band era, and early Rock & Roll 9 1953-1958) is available , price varies.
Victoryglass.com seems to be down, at least their parts page, but if you call Denny, he can tell you if they hjave the replacement parts.
Ask if the amp and receiver were recapped, 70 year cpaacitors are an accident waiting to happen.
Is the coin mech there, or was it jury rigged for free play? how is the chorme, and as Tim mentioned, are the top pilasters cracked or faded? Is the veneer in good shape?
Sorry, I'm rambling. I'd obuy it for the asking proce, if the seller won't take 750 after explaining 78's are hard to come by