I have a 21-inch Bolens push mower that has a ruined blade. Needing one right now, I went to Lowe's and found two identical blades but labeled Troy-Bilt and Craftsman. Thinking the different brands might be priced differently, I took them to the service desk for a price check, Troy-Bilt $29.98, Craftsman two cents. Wanting to deal fairly, I insisted it could not be right and we 'argued' a little bit. She insisted on "ringing up whatever anything scans".
Long story short, I paid two cents and walked out.
I went back in looking for more two-cent Craftsman blades but there were none.