Wow, good find. That's about the same as what it cost to import back when it was available.
Much like Giant's arms and legs?
It's a problem with all combiners to an extent, though it helps that Giant/Devastator is mostly one colour. That was one thing I did think was quite clever on Hercules, the use of the treads to make the forearms. I know that wasn't G1 enough for a lot of people though, hence the inclusion of separate arm pieces in the Rage kit.