I think so hun, its a pain in the neck that we can't email buyers with information. I had a problem yesterday with someone wanting more of one of my items so i changed the total from 1 to 10 and they did a bin and it charged for one lot, and the other 9 dissapeared into cyber space, my fault as it seems you cant change a one lot to a multi lot
I also find it strange that you cant as a seller to send you more pictures of an item, they can't because there is no email address,
I would change the listing to the price you agreed and then send him a message saying, I have changed the listing to our agreed price and see if he then buys it. ( hopefully )