Have you tried property-bee? It tracks changes estate agents make to a listing on Rightmove - highly addictive!
http://www.property-bee.com/
The changes for that house are quite interesting ... seems like it's had a couple of offers that fell through. Obviously nothing's certain but that could be because of bad surveys.
Sat May 19 22:56:19 2012
Price changed: from '£640,000' to '£625,000'
Sun Apr 29 23:34:09 2012
Status changed: from 'Sold STC' to 'Available'
Fri Apr 27 05:05:56 2012
Status changed: from 'Available' to 'Sold STC'
Wed Apr 25 01:11:58 2012
Status changed: from 'Sold STC' to 'Available'
Tue Apr 3 14:12:56 2012
Status changed: from 'Available' to 'Sold STC'
Wed Mar 28 19:05:36 2012
Brief Description changed: Attractive 3 bedroom Victorian house in sought after central Balham. Well placed for excellent local amenities as well as being close to the Common. Balham location.
Wed Mar 28 09:43:50 2012
Initial entry found.