Secondary sales volume for Solana (SOL) based nonfungible tokens (NFTs) has almost reached half a billion in just three months. According to data from CryptoSlam, secondary sales of Solana NFTs have generated roughly $497.7 million from around 348,000 transactions, with the average sale per NFT tallying in at $1,500. The data also reveals that Solana saw a record month for secondary NFT sales volume during September with a total of $189.4 million.