Please do not remove these items from the para market.
Having these in the para market would end the monopoly the veterans have over newbies.
Alca Bringer - newbies now have an easier and cheaper way of obtaining certs (this would solve the duping cert issue too)
Boy's Cap - newbies can now get this easier and can make this into the custome version cheaper.
OCA - cheaper OCA for everyone
Coag spells and temporal crystals - cheaper temporal boots for newbies
You anticipate new players will buy these items at 200-300% markup from the Para Market instead of at average market value from other players? I don't think you understand what a monopoly is.