80-90% of the world's leather comes from India. Cows aren't sacred to all religions but slaughterhouses only exist in 1 or 2 states, and so often cows are traded, walked or transported huge distances in high heat to states like Kerala where cow slaughter houses exist, or across to Bangladesh to be slaughtered. The leather is then tanned using pretty awful chemicals by poor locals, made into clothing and exported from India.
The Indian leather industry is pretty awful in several levels so whilst it's not what you were asking, no, I doubt a cheap eBay Indian leather jacket is great quality