0.7 eth? I think that's a very high price for an NFT that is not yet well known...
indeed what you are selling is a rare thing but it takes a long time for it to be sold at such a high price. hopefully one day your NFT can be sold.
Yeah that's quite a high price for a piece which doesn't have any real time value since mostly NFT gain value due to its reputation. But maybe in due time once the OP NFT will be acknowledge by certain investor or whales then provably it can reach up to that but for now I think the best thing to do is to sell it at affordable price and wait for the price to pump by the help of its buyers.