After a super strong February, downtown Austin condo sales fell 28% in March from the prior year period. Last month, we asked whether strong February sales was a trend or an anomaly. With the data in, it seems that the market has not strengthened from last year. For the first quarter, 33 units were sold -- one more than during the same period in 2010.We've updated the AustinTowers | TOWERS Realty Downtown Austin Condo Market Index for March, 2011. During the month, sales decreased 28% fro the prior year . . .