<<There hasn’t been much data on sales of the Google Nexus One phone, which first became available on January 5, 2009. The best data on number of handsets sold to date was 20,000 in the first week, based on an indirect analysis by Flurry.

But a reader who purchased two phones a few days apart noticed that the order slips that came with his phones have what appeared to be sequential order numbers. The orders all start with “501″ and then have a six digit number following that number. We’ve gathered two more order slips from other readers to add to the data set. Here’s what we have so far:

1/09/10: 501172214
1/11/10: 501180502
1/20/10: 501227996
1/25/10: 501256005

If the orders increase sequentially by one (and there is no reason to think that it does, just a guess), these slips suggest that 83,791 Google Nexus One phones were sold between January 9 and January 25. That’s 4,929 of the devices per day.>>

Keep in mind 17,000 were given to Googlers before it went public