In my opinion, they are not collectibles. However, if you ask someone that collects York, Indian, or Browning bows. they will say they are.
Different collectors like different things. I have a few Browingins, but the Wasp is not high on my priority list. It may be to someone elses.
Collectors usually go for the rare bows or the bows that are really in demand. That's not to say that some one with an interest in what you have would not consider them as collectibles.
I never met a recurve I didn't like, collectible or not.