I found these two G100S in a local market for around 1 dollar each. Definitely a good egg-shaped mouse aside from G102. : r/MouseReview
Refurbished: Logitech Recertified 910-003533 G100s Black 1-wheel USB Wired Optical 2500 dpi Gaming Mouse - Newegg.com
Logitech G100s Gaming Mouse Review – Techgage
Logitech G100S Wired Gaming Mouse for Laptop PC with 2500 DPI Optical Ergonomic USB Mouse Both Hands Support Official Test #Affil… | Logitech, Souris gaming, Souris