Buy new lawn mower blades or sharpen old ones?

[Updated] Lawn Mower Blade Sharpener 15°-45

How to Sharpen Lawn Mower Blades - Dengarden

How to Install a Mulch Kit on a John Deere 42 Mower Deck

Sharpening a Reel Mower

All American Lawn Mower Blade Sharpener

What should a sharpened mower blade look like? - Quora

HOW TO SHARPEN A PUSH MOWER (OR A REEL MOWER.)

[Updated] Lawn Mower Blade Sharpener 15°-45

HOW TO SHARPEN A PUSH MOWER (OR A REEL MOWER.)

How to Sharpen Lawn Mower Blades

HOW TO SHARPEN A PUSH MOWER (OR A REEL MOWER.)