And name 1 Post Office that takes 1000 lb. boxes from anybody? 

"For example, a 14 ounce bag of Ruffels in Anchorage costs $4.29 retail. The two grocery stores in Bethel, a village of about 3,500 and a bypass hub location, both charge customers the exact same price -$9.99 per bag. It could cost as little as 35 cents to send that bag via Alaska Bypass (as part of the 1,000 pound palletized load minimum shipment) In addition, it is likely the Bethel grocer would pay wholesale for the Ruffels, not the Anchorage retail price. The stores, therefore, mark up the price of Ruffels by far more than 100%. IN fact, the stores could possibly still offer the identical price of $9.99 per bag profitability even if it were delivered via the private freight market, who's rates could be five times higher (35 cents x 5 = $1.75)...Rural merchants are among the biggest beneficiaries of the Alaska Bypass."

“We are all born ignorant, but one must work hard to remain stupid.” 
Benjamin Franklin 1st Postman.