Really??? Those exist?????
They make collectors sets for specific ones yes. They are very nice quality and often come with more stuff than what was available otherwise, like Soundwave comes with all 5 cassettes. Both the Soundwave and Megatron are almost $200 each, sometimes more.
The one I really want is Starscream and Optimus prime masterpiece editions but your talking over $300 usually. Seems the collectors sets are valued higher than some of the original vintage ones unless it's complete and mint.
What surprises me about TF's in general is how sought after they are. Even the Beast Wars figures I have are now almost double the price of what I originally paid and apparently seem to sell pretty well on Ebay and virtually no retailer seems to ever have them in stock. Some are just limited runs and people gobble them up to resale higher elsewhere.
But I don't collect them as an investment cause who knows, it could be a short lived trend. I just like certain ones that either look cool or always wanted as a kid.