The best way to barter is to try to have better understanding of the area you want to "trade" to. Just posing general question will result in little and/or time-wasting responses. I would encourage you to be specific about where you want to trade to on the mainland and you should find what you are looking for in your barter offer.
74-5620 Palani Court; Suite 208
Kailua Kona, HI 96740
Phone: (808) 331-0585
Fax: (808) 331-0583
Cell: (808) 990-2710