Deadstock, an on-chain marketplace and liquidity layer for physical collectibles created by ATH Labs, has raised $2.5 million in seed funding. Bullish Capital, the venture arm of Bullish, led the round, which also included several angel investors. The funding will support Deadstock’s move into public testing and its next phase of infrastructure development for a globally liquid trading card market. Built on Arbitrum, the platform combines physical inventory, tokenization, marketplace trading and redemption infrastructure to make traditionally illiquid collectibles easier to hold and trade.