HeatingHelp.com recently launched a free service on its website where members can buy, sell and/or barter items. According to site founder Dan Holohan, nearly 35,000 members are registered.

“Since HeatingHelp.com created the forum section within its popular Wall section, users have been buying, selling and bartering everything from steam radiators, to boilers, to flue-gas analyzers,” he said. “And some people are even giving items away for free. While it’s not for commercial use, it certainly helps to clear out those unused or unwanted items.”