Bernie Sanders supporters will do anything for their main man. In fact, there's even a way for those feelin' the Bern to donate to his campaign even if they don't have cash on hand or money to spare. Online marketplace Nantique has provided a special platform for people to sell their unwanted stuff and have all of the proceeds go directly to the Sanders campaign.

Before selling or buying an item, users must agree to donate all the money to Sanders' campaign.

"The Bernie Sanders campaign is setting records in regards to individual contributions, but in order to truly have what Sen. Sanders calls a 'political revolution,' his campaign needs to think [of new] ways for people to contribute and participate in the campaign," Nantique said in a statement.

Nantique usually deducts a 5.5 percent commission fee if an item sells, but that fee is waived for Sanders contributors.

