Well, only the "big" ones go for $200-up. The only one that I felt wasn't worth the "standard" $200 was the Starscream redo. That silly cape and crown was not worth the extra money. Hell, the box was basically empty, it was so silly.
Rodimus, MP-10 Optimus, and Soundwave are more complex, and you get trailers and other extras with those guys. I think the jets were in the $120 range when I got them, but that was years ago. I have no idea how much a Thundercracker 2.0 would go for, but I'd say in the $150-180 range would be pushing the limits of its worth.