Since it doesn't cost very much, I've been tossing in a few "test auctions" here and there just to see what sells and what doesn't. I've found that light feathers never sell, and silk is tough to sell, but leathers, linen and wool always sell.
I'm almost at 200 Leatherworking now and am able to create a few "green" items, and am very close to making my first "blue" ones. I started to throw a few of my leatherworking products into the auctions at low prices to see if they would sell. I tossed in two at a time, one priced twice the minimum bid, and another priced three or four times it.
These things are selling!
Right now the "green" item I make the most is Embossed Leather Pants. And, since I can make medium leather armor kits which increase the AC of things like pants by +16, they're even better than they start out to be.
I just got back from a family weekend where I couldn't log in for a few days and am delighted to find that all three of my Embossed Leather Pants auctions sold, and I was quite happy with the amount of cash they were willing to pay for the items... MUCH much more than I'd have ever gotten at a regular shop.
Yay for leatherworking, although I am looking forward to being able to select a new profession to train in, as my skinning skill is one level away from maxed out and Leatherworking itself is only 26 levels away from max. I haven't quite decided what profession I'll go for next... maybe fishing, as that seems like another thing I might be able to auction off for some cash. Or, I could do fishing when skinning is maxed out and then do cooking when leatherworking is maxed... selling my fish early while I can't cook it, then selling cooked fish when I can cook it.
We'll see how that goes :)