I thought it seemed pretty high, too, but hadn't priced that model. With the discount, it gets it back to normal Filson pricing. Looks like retail on the normal twill field bag is $249. Makes yours appear to be quite the bargain.
FYI: J. Crew has the rugged twill field bag (looks like otter green with a grey wool top flap) on sale for $250 after 30% discount today through the 27th using the code "GOSHOP".
I have no insider knowledge, but I suspect Ralph Lauren's inventory in the past few years has been inflated and they've had to rely on these pre-sales/private sales/clearance sales to blow out more inventory at much lower margins than they would prefer. I suspect they didn't buy/produce as much this season and were able to sell through a larger percentage at prices closer to retail. It's also possible they're holding back some of the faster moving items they know they...