The **cheapest monkey to buy** would be a tamarin, which is among the smallest of monkey species in the world. They tend to range in price from $1,200 to $2,500, depending on the species and the breeder.
Tamarins are a great pet for people who are looking for a primate companion but don’t have a lot of money to spend. They are relatively low-maintenance, and although they require a lot of attention, they don’t need a lot of space compared to other monkey species.