The problem with .50 AE is that only two companies are producing this round. The primary is Samson out of Israel, however they rarely ship any reasonable quantities to Canada. The second is Hornady, but we have yet to see even a single round from them.
The US State Department has placed a ban on the export of all .50-calibre ammunition crossing the border into Canada. This includes handgun ammunition such as the .50 AE. While for some strange reason we are still able to get the .500 S&W round, the .50 Action Express is more of an anomaly.
Here at Epps we routinely advise purchasers of the Desert Eagle that the .50 AE round is
extremely difficult to acquire, and
extremely expensive!
Our last batch ran about $80.00 for 20 rounds 
The last time we had any of this cartridge in stock was about 18 months ago!
For DE buyers, I routinely advise that the .44 Magnum version of the Desert Eagle is dimensionally identical to the .50 AE, and easily interchangeable (barrel & magazine), with the sole difference being the size of the hole at the end, which no one would see unless you point the gun at them! .44 Magnum ammo is readily available, and sells for $32 -- $35.00 for 50 rounds, compared to the above-noted price for the scarcely available .50 AE.
Of course it seems all DE buyers live by the motto "Bigger is better!", and not by the more realistic train of thought that if they are going to purchase a $2,000 + handgun, THEY MIGHT WANT TO SHOOT IT AT SOME POINT!
