The BTA price is usually at its lowest roughly 30-60 minutes after the bundle starts. It usually starts off pretty high, then drops quickly, and climbs steadily back up until it levels off. It'll take a quick dip when the extra games are added, but it'll usually stay fairly consistent.
"How do I get rid of a Trojan Horse?" -Sailor_Kakashi "Leave it outside the gates of Troy overnight." -Davel23