This thread might give you some ideas, though I need to update it:
http://www.city-data.com/forum/st-lo...ga-thread.html
If you want to wait a little longer, the Roberts Lofts, next to the Mayfair, is being constructed. They are Luxury Lofts, though.
This might help you, too (let it load).
http://www.downtownstl.org/docs/2008...g%20Report.pdf
This above PDF lists the following condos/lofts for sale:
10th street Lofts - Sold Out
Downtown St. Louis Partnership - 10th Street Lofts
2020 Lofts (the official site appears to have been hijacked) sold out
Downtown St. Louis Partnership - 2020 Lofts
Adler Lofts - Units Available Price $174,230.00 - $370,230.00 Sq. Footage 869 - 1722
Downtown St. Louis Partnership - Adler Lofts
Alexander Lofts Units Available - Price $420,000.00 - $460,000.00 Sq. Footage 2200 - 2400
Downtown St. Louis Partnership - Alexander Lofts
Annex Lofts - Sold Out
Downtown St. Louis Partnership - Annex Lofts
Ballpark Lofts #8 Units available Price $153,424.00 - $396,060.00 Sq. Footage 802 - 1590
Downtown St. Louis Partnership - Ballpark Lofts #8
Bankers Lofts - Units Available - Price $202,000.00 - $728,500.00 Sq. Footage 1231 - 3110
Downtown St. Louis Partnership - Bankers Lofts
Blu CitySpaces Units available Price $82,400.00 - $178,400.00 Sq. Footage 427 - 814
Downtown St. Louis Partnership - Blu CitySpaces
The Bogen Units Available Price $231,900.00 - $459,900.00 Sq. Footage 1100 - 2134
Downtown St. Louis Partnership - Bogen, The
Dorsa Lofts - Units Available - Price $169,900.00 - $791,317.00 Sq. Footage 1390 - 3751
Downtown St. Louis Partnership - Dorsa Lofts, The
Elder Shirt Lofts - Sold Out -
Downtown St. Louis Partnership - Elder Shirt Lofts
Ely Walker Lofts - Sold Out -
Downtown St. Louis Partnership - Ely Walker Lofts, The
Garment Row Lofts - Sold Out -
Downtown St. Louis Partnership - Garment Row Lofts
King Bee Lofts - Units Available - Price $136,000.00 - $354,000.00 Sq. Footage 1088 - 3269
Downtown St. Louis Partnership - King Bee Lofts
Knickerbocker Lofts - Sold Out -
Downtown St. Louis Partnership - Knickerbocker Lofts
Louderman Lofts - Sold Out -
Downtown St. Louis Partnership - Louderman Lofts
Lucas Lofts - Sold Out -
Downtown St. Louis Partnership - Lucas Lofts
The Marquette - Units Available - Price $170,000.00 - $1,000,000.00 Sq. Footage 803 - 3000
Downtown St. Louis Partnership - Marquette, The
McGowan Lofts - Sold Out -
Downtown St. Louis Partnership - McGowan Lofts
The Meridian - Sold Out -
Downtown St. Louis Partnership - Meridian, The
Moon Brothers Carriage Lofts - Sold Out -
Downtown St. Louis Partnership - Moon Brothers Carriage Lofts
Motor Lofts - Sold Out -
Downtown St. Louis Partnership - Motor Lofts
Packard Lofts - Units Available - Price $156,380.00 - $227,000.00 Sq. Footage 765 - 1400
Downtown St. Louis Partnership - Packard Lofts
Paristyle Lofts - Units Available - Price $184,500.00 - $700,000.00 Sq. Footage 1400 - 4200
Downtown St. Louis Partnership - Paristyle Lofts
Printers Lofts - Sold Out -
Downtown St. Louis Partnership - Printers Lofts
Railway Lofts - Sold Out -
Downtown St. Louis Partnership - Railway Lofts
The Syndicate - Units Available - Total Units 102 Price $185,500.00 - $767,500.00
Downtown St. Louis Partnership - Syndicate, The
Terra Cotta Lofts -Sold Out -
Downtown St. Louis Partnership - Terra Cotta Lofts
The Ventana - Units Available - Price $202,900.00 - $283,900.00 Sq. Footage 1021 - 1309
Downtown St. Louis Partnership - Ventana, The
West Gate Lofts - Sold Out -
Downtown St. Louis Partnership - Westgate Lofts
Windows Lofts - Sold Out -
Downtown St. Louis Partnership - Windows Lofts
Hope that helps. And of course you can look for resales. The bolded have units available.
I'm sure Brickmama could give you more insight into lofts.