Is there a way to up your offer within 24hrs if there is no response please? I could ask in the Q&A for it to be removed, then re offer higher, but its like information to the enemy (other buyers : )) is it not? It would be great to have the option to enter a higher figure, much like increasing an autobid, yes? Asking for a friend...  

Why can't I increase my offer if the seller has not responded please?