I've never seen an M400 this cheap before even as a trade up. The trade up program is that you retire a previous product or another brand product for activation of the warranty. Usual CDW Outlet caveats--possibly open box or clearance and quantity of one per sku unless they have more (call CDW to find out):
WATCHGUARD TRADE UP FIREBOX M400 (BS - WGM40061-BSTK - Z - CDW Internal Use/Service Pts - CDW.com
There is a second one but it's not yet fallen to $790, sitting at $989 currently (which is still 50% of what I find these for):
WATCHGUARD TRADE UP FIREBOX M400 (BS - WGM40061-BSTK - Z - CDW Internal Use/Service Pts - CDW.com
WATCHGUARD TRADE UP FIREBOX M400 (BS - WGM40061-BSTK - Z - CDW Internal Use/Service Pts - CDW.com
There is a second one but it's not yet fallen to $790, sitting at $989 currently (which is still 50% of what I find these for):
WATCHGUARD TRADE UP FIREBOX M400 (BS - WGM40061-BSTK - Z - CDW Internal Use/Service Pts - CDW.com