[bl-is-future]

should be no other fees for buying an item. It does have fees for the seller as you know form your selling history. It is very simple. Only thing is add your bank account and any other cards well before you plan to buy because sometimes it takes a few days for a card or account to be confirmed. If you have done this already from selling then you are set.
Oh and just transfer funds directly from your bank account or card of your choice, no need to deposit money in it before hand.