he agreed on my price
he required some stress tests
he ask some questions
he transferred the amount
i gave him working proof before pulling out the product from my system
he asked some other items and paid for them too on the spot
i shipped the product very next day
he received after 2 days due to bad weather
he test the products and there was a problem with his TX 650 watts power supply
he tested the product with other power supply and confirmed that his older supply was having issues
he confirmed that my product was good and there was an issue with his system
huge thanks to him for such patience and cooperation