Gene Munster at Piper Jaffray has a way of guestimating sales of Apple (NSDQ: AAPL) products by visiting various stores and watching how many are being sold. While there are some problems with the approach (margin of error, doesn’t count all channels) with some historical back-up it can give a good indication of how many people are buying a product. He reports that the average Apple store is selling 22 iPhones per day (90 for flagship stores, 16 for general stores), which is well below July/Aug ‘08 (95 per day) and Nov. ‘08 (28) and suggests a 15 percent drop to about 3.7 million iPhones for the quarter. Munster suggests that with international sales factored in Apple may meet its target of 4.4 million units for the quarter, although the Street is expecting only 3.3 million. (Apple 2.0)

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