Oak Logs look like a wave item. Basically this means it rises and lowers in a wave pattern. If you see the 90-day you'll see it's quite evident. Buying them now would just mean you get to keep them for their downward fall during the wave, and since it's a downward wave (meaning it's falling overall, but still has wave patterns) you'll lose money buying it now. I advise buying it an update or two before the end of the wave and sell it an update or two before the wave reaches it's peak.
EDIT: If this doesn't make sense to you I'll put up graphs as examples. PM me or MSG me on MSN if you need further help.
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