dont think this's for woodcutters.. as icecube mentioned he's buying oak logs for construction. anw lumbridge's a nice place to buy willows for firemaking. Ya the only use for the logs in the shop is firemaking, construction and perhaps even merchanting. I'm not too sure why people sell them to the shop, but maybe it's because they don't know selling prices for the logs. You can buy willows at lumby or varrock for firemaking for only 12gp each. Not too bad if you don't want to cut your own. Oak logs are great for construction cause they're plentiful and good experience. You could also merchant willows/oaks by buying them in the shop, willows are 12gp, oaks are 6gp, then selling for their usual prices.