A colt by Montbrook and a filly from the first crop of Straight Man each brought $50,000 Tuesday to top the first open session of the Ocala Breeders' Sales Company's August yearling sale in Central Florida. In addition, the average and median prices for the session both were ahead of last year's pace.OBS reported that 218 horses were sold for a gross of $2,273,600, both down from 2002's comparable figures of 227 and $2,287,700. However, the average increased 3.5%, from $10,078 last year to $10,429 this year. And the median grew 22.7%, from $5,500 to $6,750. The buy-back rate rose from 22.5% to 27.8%."I was a little disappointed to see the buy-back rate go up, but it was still reasonable," said Tom Ventura, the OBS general manager and director of sales. "If we maintain this $10,000 average, I'll feel like we did fine. Last year, after three days of open sessions, the average was about $8,800 ($8,814)."The $50,000 Montbrook colt is out of the winning Ziad mare Round Z. Bend, who is a half-sister to stakes winner Court Splasher (by Bucksplasher). Solitary Oak and Parrish Farm purchased the colt from Cloverleaf Farms II, agent.The $50,000 Straight Man filly is out of the Spectacular Bid mare Sea Bid, who is a half-sister to stakes-placed Taylor's Thread (by Gold Seam). Dominic Brennan, who represented Barrister Hall Stable, purchased the filly from Abbie Road Farm, agent.Two more open sessions will be conducted Wednesday and Thursday, beginning each day at 11 a.m. (EDT).