So we know estimates of approximately 300,000 WiFi models sold on Day 1. And today we hear some estimates that over 500,000 WiFi models have sold to date. Ad firm says iPad sales have topped 562,000, at the very least | VentureBeat So what's your guess: How many 3G models will sell on Day 1? First week? My guess is 350,000 on day 1, and 600,000 within the first week.