NFT collections from former United States President Donald Trump are topping secondary market charts, and at least some of the sales came from NFT traders who bought in as a joke.

Currently, the cheapest-listed Trump NFT on leading marketplace OpenSea starts at about 0.15 ETH, or nearly $180, but had been higher earlier this morning. The NFTs initially sold for $99 apiece.

Over the past 24 hours, no collection has put up more secondary market trading volume, as OpenSea shows 1,204 ETH—or about $1.44 million worth—of trades.