CoreTek is the US market leader in the management, reconditioning, disposition and remarketing of off-lease, pre-owned and surplus office-technology assets. Coretek creates high value for its customers by providing its. Suppliers. Of equipment. Leasing companies, corporations, retailers / . E. -tailers and original equipment manufacturers. With major savings in time, money, people and capital required for asset recovery and superior residual market value, while giving its buyer customers. Businesses, schools, hospitals, institutions and individuals. Excellent technology products and services at outstanding prices.