X2Y2 market says:
:"The actions below consume gas fee:
Approving WETH or any collection (One-Time only);
Buying an NFT;
Accepting an offer;
Canceling a listing;
Transferring NFT to another address;
Bridging between WETH and ETH.
--None item on the list have a price, so they could ask you anything.
I think this site is a scam. An honest marketplace states the prices they ask.
--Please, dont say traffic jam on ETH or similar shit.
The price could be given as percentage.
Hi, welcome to the community! 
I am not sure for this, I only know it is a NFT market. You should judge for yourself.