The average monthly costs of keeping pet reptiles vary significantly based on the type of reptile. For smaller lizards like Leopard Geckos, expenses can be as low as $20-$30, primarily for food and substrate changes. Bearded Dragons might cost slightly more, around $30-$50 per month, due to their larger habitat and varied diet needs. Snakes such as corn snakes also fall into this range. Larger or more exotic reptiles, such as certain types of snakes or turtles, can cost $50-$100 or more each month, depending on dietary and habitat maintenance requirements.