I know Kson make pretty reasonable refractors for the price but I have never heard of or seen a 102mm f11(ish) newtonion reflector ?
What type of mount does it have , as Dannat asks ?
Can you snap a few photos of the whole scope showing the mount as well , and some down the tube to show the mirror and secondary /focuser etc ,.
But I second Dannat's advice you will be better served grabbing a 2nd hand 6-8 inch dob , there are a couple here in IIS's classifieds at the moment .
At least these will be well known and proven performers .
Brian.