I bought a Konsul because I like adjustables (vintage and modern) and slants, and the Rex Ambassador was an indication of the manufacturing quality I might expect, especially for the price. I find it's a first-rate shaver, and ticks all my particular boxes.
If you bought one now, and then sought to sell it fairly soon, I think you'd lose money on it. Whether that would change, over a period of years, depends on how "special" in terms of design and quality it is, and rarity value. I have no idea of how many Konsuls there are or will be "in the wild", but I don't think it's going to be quite as desirable or collectable as, for example, the Rocnel Sailors.