I feel your pain. If I had the cash to spare right now, I would buy your sweet little keyboard in a heartbeat.
About a year ago, I was in a very similar situation. I wanted to sell a great bolt-modded Model M. I was assuming that a clean, complete, tested, properly bolt-modded, IBM-made Model M would bring at least $20 or more than the price of a new Unicomp.
Wrong.
After weeks, both here and on ebay, I finally sold it on ebay in the $50-55 range.
Today, I see that rather poor specimens of the Model M are selling at that rate, so, clearly, I should have just waited.