Half a bennie is not bad, but if you intend to flip them, don't look to make a killing.
I sold a pair of in the cabinets with the marble tops and front scroll work in very good shape (C51 Apollo cabinets) for $500 that needed refoam. A friend gave them to me, and the buyer was extremely happy to get them.
But that was over 10 years ago, and these things have gone up to the right buyers.