most MP lines tend to hold their pricing except for MP Rodimus/ Sunstorm - MP Rodimus due to QC issues and the issue in Hasbro version...
MP Sunstorm is due to too many repaint of "Starscream"
the most popular now is MP Lambor... many retailers were surprised that the pricing has gone up (from pre-order pricing) even the MP Buzzsaw/ Ravage/ Rumble/ Frenzy too... considering that this is not the first time the cassettes been produced!