I do have RRP on my todo list, but I don't want to list "current retail" prices because they're constantly changing; and the focus is more on helping people filter the list of options than to be a price comparison.
I really don't want to get into being a price comparison site. If I add prices, people will constantly be telling me they're wrong. I want to focus on specs/facts that don't change as much as possible.
I've added RRP, but it's currently unpopulated.