Is Walmart clearencing the VTSC yet
It depends on the Walmart. Most of my local Walmarts have clearanced them out already, but then there are those that aren't so local that still have them at full price. Your best bet is to scan them every once in a while. They should clearance eventually.
I picked up the H&V Greivous variant, Shock Trooper, Green Clone Commander and a Saga2 Sandtrooper this morning at Target.