For the 4GB version of the Nano over 70% of sales were for black Nanos. The peak selling times were between 5-8pm (PST), with 8pm being the most successful accounting for an average of over $160,000 worth of sales per hour. During its peak, 4GB black Nanos were selling at a rate of 475 per day and generating over $100,000 in revenue.

The average price for 4 GB iPod Nanos, both black and white in December was $318. The black Nano pulled in approximately $313 per sale, while the price of white Nanos was significantly higher at $330. It is interesting to note however, that when compared to a three month trend it is clear that white Nanos were maintaining their average price, while black Nanos were experiencing a significant dip from their peak of $450 per iPod during high weeks in October and November. The highest average price for a white Nano was $350 during these same times.

The high price of black iPod Nanos during October and November is due to the initial shortage of black Nanos during Apple's original launch. This resulted in a price spike for black iPod Nanos on eBay once they were available. An interesting note for buyers is that 11 p.m., midnight and 2 a.m. resulted in the lowest average prices for iPod Nanos in December.

For the reference, Terapeak is a company started by a couple of eBay sellers with a mission to enable the eBay community by providing quick and accurate marketplace research.