Good find... The the only thing that still gets me is the price though. That estimate and conversion is WAY off. BMW would not make the M3 MORE expensive than its larger sedan counterpart, the M5. That would completely throw off the marketing strategy.
Right now the US MSRP for the M5 is 82k, the M6 is 98k, and M6 convertable is 104k. The M coupe is at 50k. Given the previous models pricing schema, i would expect this to still stay true, each model would see a 15k to 20k price diff.
Having said all of that, it puts the M3 in the 55k to 65k price bracket.
I am only speculating but all previous years seem to hold true because each model attracts a specific market and clientle.