Red flags for days. It just is what is folks when you see shit like this for sale move on. There is no legit OGK in seed form currently other than the TK S1's offered by CSI. No one else has been able to get enough viable pollen when reversing, period.
And don't go buying TK seeds if you are not a professional level grower. By that I mean if you can't maintain picture perfect plants on the regular you have no business throwing money at these genes. They are so fuckin finicky and hard to deal with in every growing process from reversing, germing, cloning, to veg, to flower they are nightmare plants for the vast majority of growers out there to keep alive. This is just a warning. I have been doing this for over 20 years now, never stopped, and I just shake my head when germing TK seeds or even a some of the OGK crosses that lean hard OGK. When cloning take 2 and 3 times the amount you normally would of your keeper. I can get them to root (even the hard to root ones) every time these days, but you will want to be looking for the best root sets to flower.
Despite the nightmare for most growers, it is dream pot.