If anyone wondering how long g502 can last, here's mine that I bought around 2016 and still going just fine. Except those rubber pads and scroll wheel has lost some textures :
Just picked up a G502 Lightspeed and I love it. : r/G502MasterRace
Logitech G502 Lightspeed Wireless Gaming Mouse Review | A mouse that compromises on nothing
Does your G502 feel too heavy? Try placing your weights as shown (now including Lightspeed!), it alters the center of gravity so it feels lighter. : r/G502MasterRace
G502 X PLUS : r/MouseReview
Logitech G Hero mice. Logitech G502 Lightspeed wireless vs G604 Lightspeed wireless VS G Pro : r/MouseReview
G502 Lightspeed VS Razer Viper Ultimate : r/MouseReview
Found a great little case for the G502 Lightspeed! : r/G502MasterRace
Logitech G Hero mice. Logitech G502 Lightspeed wireless vs G604 Lightspeed wireless VS G Pro : r/MouseReview
So the G502 Lightspeed is $100 at the Moment... Worth Upgrading To? : r/G502MasterRace