Calculating the price of qurbaani animals when making qadha

Q: A person has many years of missed qurbani that he needs to make up for by paying market values.

1. Must he use the market value of a local animal (which would be expensive) or can he use the market value of a cheap country (such as the value of 1/7 cow in India)

2. Should he use the market value for the current year, or should he use the market values for the past years when he missed the qurbanis?