What's the best way to mark something before selling online?

maharg101

Ah, ok. How about UV markers ? https://shop.immobilise.com/

Edit: just seen @drofluf got there on the first reply ! 

mrkb

GoFish said:

You can still "water" mark the pictures by pissing on em. Works for guitars, electronics, car interiors, children's toys, furniture, upholstery, clothes, houses and Exes

if the pictures are stored on your phone is it ok to piss on that to watermark them all in one go?

marxski

Earwax is the unpopular choice for used headphones

Jono111

Marks or serial numbers will not be regarded as proof of what you sent by eBay. I could take pictures of a Gibson and post a Harley Benton.

robgilmo

Jono111 said:

Marks or serial numbers will not be regarded as proof of what you sent by eBay. I could take pictures of a Gibson and post a Harley Benton.

Why post the better guitar?