Well, probably you are in trouble now OP, advertising scammy exchange shown reply above.

Besides, this is not an appropriate board because you are not paying BTC, Ethereum is altcoin and you should move this in altcoins board here, https://bitcointalk.org/index.php?board=238.0
You also forget to hire escrow service(unless if you are reputable enough), maybe you need to see this link for reference, https://bitcointalk.org/index.php?topic=5047302.0.