Correction: I made a mistake---the M1A2 will NOT be cheap at retail price. It will be cheap from HLJ, but probably not outside the Asian Rim.
What I meant was, the new M2A2 ODS at 2500 (2800?) Yen at HLJ = around $27 USD. For retail, it's mostly doubled so $44 USD retail for the M2A2 ODS, which compares well to the retool of the M2A2 non-ODS at $45 retail back that kit was released. The M113 ODS is around the same price as the M2A2 and M2A2 ODS so this compares with the price of a retooled/ added kit.
So 3500 Yen for the M1A2 = about $30 USD at HLJ = doubled for outside Asia = around $60 USD retail, which is about the same price as a 100% new Tamiya MBT kit (remember the Tamiya T-55 sold for $56 retail? One can get the Humvee for $19 from Asia; it's around $40 retail outside of Asia, again doubled).
If the M1A2 was a rebox, or added sprues, why not $44 to $52 retail like the M2A2 ODS? Correct me if I'm wrong, but I've never known Tamiya to add extra sprues to MBT kits (like DML) to upgrade them.
All I'm saying is that the M1A2 has the price of a new Tamiya MBT. It seems Tamiya prices accordingly and charges for all the work done on the (new) kit. Let's hope so, at least

.