what are "must buys" in bali ubud?
Buy anything made of leather, i.e., leather bags, leather wallet, leather belt, etc. That would be great.
If you get a leather belt wet, will it change colour or affect its appearance?
It depends on what kind of leather is used to make the belt. Some leather is less prone to water damage than others. Getting leather wet can result in a water mark & having the dye bleed.
How do you tell the difference between real from fake (100%manmade) leather, especially when buying from ebay?
If you can't touch it it is difficult, maybe you can try to check if it has pores. Fake leather doesn't have pores, it is synthetic, real leather has pores (it is skin after all), and you can see these tiny black specks. I would not risk it. Even if ...