So here is some more clarifications on the models history. The first Attaq was the first Reebok basketball shoe to feature Graphlite, it was a brand new technology for Reebok so naturally they wanted to implement it in the shoe for a player that was number one on their contract. The original Attaq released for $125 (the retro was $160) which was a lot of money for the time only Jordan's were that expensive and some Command Forces. With next one Reebok wanted to make a cheaper shoe, because they were hoping for bigger sales margins thats why the original Attaq ll was $100. Seeing the poor reception of the Attaq ll and the arrival of the Insta Pump technology, Reebok went ahead and created a top performer with all the available tech that they had at the time and the Attaq lll was $130.
The Attaq lll being the most expensive of the 3 IMO is very highly unlikely to retro any time soon, unless something dramatically changes at Reebok and their management.