The majority of it sounds pretty legit except for the sexlink part, that's wrong, its shoud be a RIR roo on RIW hens for the chicks to be sexable at hatching.
Also it is way over priced.
And since it has a single comb, it is most likely a hatchery "RIW", and not the true ROSE Combed RIW, therefore all of that ALBC information is comletly irrelevent because that is for true RIWs, not the. single combed crossed birds that hatcheries like Welp and Ideal call RIWs