Risen Better Prices?

I've been hoarding all my items since the beginning because I don't want to sell stuff for less than I might be able to get later. Anyway, is it even possible to get better prices from traders or is what they offer to buy items the best I can get? The value and amount they are willing to pay seem very, very different. Is there a skill I can train to improve my ability to sell items for higher? Will merchants spend more on my items if I join their clan/group? I could certainly use the money now, but it is worth waiting if I can get more for my goods later.

Thanks for the information!

While you might arrange to get better prices later, there is just SO much stuff to collect and sell that money really won't be a problem down the track. Don't waste money early on, but don't hoard too much. If you really search, there's a lot you can get for 'free'!!