Anointed procession and white doublers

Are white token doublers in a some sort of price bubble? Cards such as anointed procession, Mondrak, exalted sunborn and Ojer taq; are all fairly expensive, especially compared to their green counterparts.

Can we reasonably expect them to come down in price anytime soon? I ask not as someone trying to flip or profit off it but as a player that wants to include those effects in a non green deck.