First Brazos Place. Then Bel Air. Now the Sage.This week the Sage Condos in South Austin -- 1702 South Lamar -- announced that they will be selling the remaining 23 units through an auction on August 22. This is the third major auction in the Austin market. In May, the Brazos Place auctions saw strong demand. The second auction, for the Bel Air condos in far south Austin, is scheduled for this coming weekend.While it remains to be seen how the successive two auctions fare, there is a big difference between Brazos Place and the other two projects. In particular . . .