The Ohio Valley Refinery & Roadshow returns to Cumming this week to appraise coins, antiques and other potential valuables.

The public can bring items to the free event at Comfort Suites from Tuesday through Saturday to find out what they are worth and also sell them on site.

Spokesman Matt Enright said anything with a possible monetary or collectible value could sell at the show.

The roadshow workers will determine what an item could be worth and seek out possible buyers from the company's database, Enright said.

Old coins always have potential to bring in a large check, said Enright, who added that lately guitars have been a popular item among buyers.

An 1852 coin recently brought in $30,000 and an acoustic guitar drew $46,000.

Some more unusual items have also attracted interest and investment, he said.

Recently, an 18th-century electric chair found in a basement fetched more than $7,000.

"It's kind of crazy the stuff that people are interested in," Enright said. "I guess everybody has their hobbies.

"There really are no categories we're not looking at, from comic books to pocket watches to currency."

Since Ohio Valley also has its own refinery, the company can accept precious metals, such as gold, silver and platinum to be melted and sold.

"They can come directly to a refinery and get a much better price from us," Enright said. "We're cutting out the middle man."

Prices for all these metals have been high on the market, he said.

There's no limit to the number of items people can bring, Enright said. Wait times average between 15 and 45 minutes to see a show worker.

Springfield, Ill.-based Ohio Valley and sister company Treasure Hunters Roadshow both made a stop in town last year.

Organizers want to keep the visits annual, Enright said.

"We set up a precedent in towns, and people expect us to come back," he said.