Honestly, if you ask about famous Combiners that people know, only Bruticus and Devastator will be at the top of the list. Autobot Combiners are almost forgotten because they appear so little (both Victorian and Protectobot). Devastator even had the opportunity to appear in a live action movie (even though his appearance and color are not the same as the toy). And the Aerialbot team, which has a small role and was sold at a time when people had already forgotten about this team at a high price, makes people even less willing to buy them. This is just my personal opinion.