The Vegan Society defines veganism as follows:
Veganism is a way of living which seeks to exclude, as far as is possible and practicable, all forms of exploitation of, and cruelty to, animals for food, clothing or any other purpose.
Purchasing new leather is inconsistent with this vegan philosophy because it involves giving money directly to an industry that exploits animals. Is buying secondhand leather consistent with this philosophy because no money goes directly to the animal-exploiting industries?