I have the entire series and there are a few notable standouts but only if you don't already have their original European releases:
Optimus Prime is a repaint (and a superior one at that) of Thunderclash who got released as a Botcon repaint of E Rodimus in '09. Chart that
Soundwave is a repaint of Stalker and was repainted again as Soundwave in blue and neon yellow for the Universe 1.0 line.
Starscream is a repaint of Skyquake. Skyquake was also released as a Botcon repaint of E Starscream in '09. There's a pattern emerging here.
Sandstorm is a repaint of Rotorstorm of Last Stand of the Wreckers fame. (you know,
The rest are just the flip-changer jet, formula-1 racer, and tow truck repaints and can be skipped entirely. Back in '02 I got the entire line except Optimus for I think around $80 and I can't imagine they'd cost much more now. Still, back in the 90's, it was either Beast Wars, these or Animorphs.