.... the seller has it listed for $495 which I understand to be about $200 or so too expensive.
1)1930's...not. That is a '66 or later...
2) 'too expensive' if the horn is not in playing condition. Not unreasonable if it is. Now, thing is....if it isn't, you have no idea how much it'd cost to make it playable. Could be $150, could be $500. If $250 tops in repair work, then it'd be a good take at $200. But if service estimates exceed $250, then you could spend your $450+ better on a different horn.
So perhaps not a great deal even at $200 (again if not playing up and down nicely).
3) these are the later Cleves, the redesign of keywork right before the company moved to Eastlake....which became the 615's. Same bodies as the earlier, Cleveland-made versions, but the keywork is clunkier. Not 'bad' for a budget vintage horn, per se ( I mean, no worse than a Bundy I, for example), although quite honestly a Conn 16M or Holton Collegiate is gonna be more responsive under the fingers. But still a good-quality player when set up right.
Thanks for the kind words, mates. I don't have any Cleves here now, but I do have a bunch of c. $500 zone Tenors lying around...many not listed on my site.