it gets even better: I don't think that's an actual "sale" price, it may well be a permanent one. It's been $350 for a M350 at AoA for quite some time now; the click for sale price is only a recent thing. I don't know if it's a gimmick to get attention, or something to make a customer think they have to buy right away before the "sale" ends, or if they can't show their real price directly because the distributor forbids it (something I've noticed in other sports: you have to click to get a price from a retailer if it's below a certain level so as to not let them compete "unfairly" with other customers of a distributor). Maybe it's something else I haven't thought of. Who knows. What I do know is that it's been $350 for a '350 for at least several months now.
Just off the top of my head, the M48 is $330, the 350 Feuerkraft is $320, the M 34 Panther is $192, and those prices haven't changed in a long time either... AoA doesn't do coupons or free shipping but nor do they seem to use the usual markup others do.
