I believe your harvesting skill can not go above the cap set by your tradeskill level. Harvesting would be a waste of time if you toss everything you got from them. If you end up selling the stuff via your bulletin board, however, then I figure a high harvesting skill would be good so you can get more and sell more.
I'll assume you don't have any harvesting skills above 40? If so, then you probably will only be able to harvest in the newbie zones (Oakmyst Forest, Peat Bog, Forest Ruins, etc).
Everything you get from the points are worth keeping as they are the raw components that crafters need. Tin for smithing, wood for woodworking, salts for cooking and so forth.
If you won't be crafting, I'd politely suggest you don't harvest. That way the crafters who do need the components can get them. If you need the cash, I can't, and don't want to, stop you from harvesting and selling them. You pay for this game as any other and can do what you want. But please think of others if you just destroy the components you harvest.
Edited, Fri Nov 19 00:09:59 2004 by ArcosKojin