anything i sell is sold with the understanding it has been made with the highest archival techniques available, which includes only using fiber papers, toned and mounted on 100% rag board.
They have improved over the years, but i still don't like the look of the RC paper and will probably never use it. On the other hand, i am very old school and use graded fiber paper and intend to continue until it is no longer available.
This is my personal opinion, and i would encourage you to decide what you want to do based on the work type, the look , etc. that you want for your photos. Also, which market are you selling to, may influence that decisions.