Sample order Review on Tradekey

I just simply search Aluminum Profiles Companies on tradekey then I got this buyers profile. This buyer seems to be very potential and dealing in the same product, then I decided to make a solid connection with him over tradekey, a very next day he rep**** and then i had shared product catalog with him. After reviewed our product catalog he showed his interest in our company then I decided to offer him some paid samples. After 5 days, he finally revert back with the samples terms and condition and request me to send samples asap, now he just received our sample via TNT service and get back to us and asked for more.