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 :
Logitech G502 Proteus Spectrum RGB Tunable Gaming Mouse, 12,000 DPI On-The-Fly DPI Shifting, Personalized Weight and Balance Tuning with (5) 3.6g Weights, 11 Programmable Buttons - NWCA Inc.