If you check the threads, you will see that there was a previous discussion on this topic.
There is no good answer:
If you check eBay, from time to time you will find them for less than $83.
If your LHS made a large purchase, they would have been able to get a discount and you get them for a reduced price. Otherwise its still $83.
The only other way to get a reduced price is to get 10 or more people together and make a group purchase directly with AMB and then you can get a discounted purchase. There is a price break at 10 and then at 20. Depending on how many you purchase you can get a reduced price of $73 to $65 each.
If all you are looking for is one, and none of the options presented above work for you, then the best place to purchase is directly from AMB and the cost will be $83.
Over on the 'on road' section there is a thread where people are buying as a group... I just got in on a group a local guy did... and I see anohter guy says he's doing one.... not sure if it will help you or not... but might be worth a look.
The guy is McSmooth... and gave this site as where he's from...