I switched over to the generic IKONG ink for my HP Deskjet.. all four cartridges for $20 vs $55 for OEM. Print quality is as good or better:
https://www.amazon.com/IKONG-Updated...ink+cartridges
Regarding retail... most of these big box stores will die slow deaths.. ToysRUS, Staples, Office Depot, etc etc etc.. Amazon has better customer service and can get you most items same or within 2 days at no extra cost.