6-foot tree in 5-gallon pot.  $99
Zone 3.   Very pretty apple with the distinctive MacIntosh flavour which makes it great for eating fresh, baking, canning, applesauce etc.
 
*Apple trees in rural areas need a cross-pollinator to produce fruit (urban centres have enough pollen in the air from existing apple trees). Be sure you have 2 different types of apple trees to achieve cross-pollination.