The pricing of modified Toyota vehicles is primarily driven by the base model's year and condition, the authenticity of performance parts, and the complexity of the modifications. For instance, a Toyota Hiace modified for luxury VIP transport will command a higher premium due to bespoke interior craftsmanship and electronic integrations, whereas a modified Hilux for off-road use focuses on suspension kits, snorkels, and reinforced bumpers. Buyers should also account for labor costs for specialized tuning and the brand reputation of the modification house.