Another quick tip to get some quick cash: Red Seaweed sells for a decent amount. Your reputation with the trader decides how much you can sell for, but at +50 reputation with Rhett in Hernand (the armor and weapons trader, you will have this level of rep if you completed his request), I was able to sell them for 49 bronze each. You can find Red Seaweed along most beach coasts. I spent about 15 minutes running up and down the coast by the Steel Mountains and was able to get 27 of them. 49 Bronze x 27 Red Seaweed = 13.23 Silver, not bad for such little work. You get anywhere between 1-5 Red Seaweed at a time, so it's not hard to get a decent amount of them.
Also about the reputation thing, try giving gifts to traders to increase it. They seem to have some sort of preference, Rhett really liked the soups I gave him and another trader only accepted copper pouches. Greeting them gives you +5 rep, gifting items gives anywhere between +5 to +20 rep per item. Apparently they can also have unique items in their shop if you max it out, but I haven't gotten a trader to +100 reputation yet.