u/Apprehensive_Car_294

hello, im looking for slotted/ 1:1 firmware, dont mind paying around 1.5k dollars but just want to know where to search in regards to this. also, how can i know that my firmware is actually slotted and isnt just some free one being resold? trying to prevent myslef from getting scammed here. i am searching for slotted or 1:1 since i am a relatively higher level player and do not want to get banned due to bad firmware