That is pretty low. I'd just suggest waiting for the share price to dip to the 45-50% NAV mark before considering a buy, though that % dips lower each year as confidence in management erodes.
Besides, the good Uranium, Potash and Precious metals explorers/juniors/near producing projects are cheap enough that Pinetree is not worth the risk/hassle. Low volume, little interest, life sucking management fees. Buy at 45% NAV sell at 55%