I want to sell online some of the electronic stuff that I don't need anymore, such as my ASUS Wi-Fi router, and I'm wondering when I upload photos of it should I leave its serial number, MAC address, and pin code written on the back of the device visible or should I photoshop it out. I checked other people's stuff pages and many of them take explicit photos of their devices' serial numbers, MAC addresses, etc. Why?
Furthermore, some potential buyers don't want to buy your product if ID numbers are blurred out. Why so, why do people need to see those numbers of the products they don't own yet and do they actually need to? Is it safe for me to publish such data? Theoretically, someone can go into their ASUS (or another brand) account and register a product with my serial number, if I haven't registered it myself, right?