Now that apparently GTA is confirmed for a late april release, my prediction for a price drop will come true. The Pro in March $279.
Yes, last time was a $50 drop, but I think it was RocketPig who showed the combo pricepoints of $199 Arcade, $279 Pro and $349 Elite were more logical (or else the difference between Arcade and Pro becomes too big). I'm not really sure about a $349 Elite though.
So call that a $70 drop (since the Pro is the main SKU). That's my prediction.
March.