User Activity

I have a buyer who has made an offer on 3 items and I would like it set up so only she can bid. Is this possible.thank you
Am i likely to incur any penalty or downgrading if I sell small cheap items in an untracked envelope.
Recently when i had a few items for sale I noticed my feedback had become invisible to potential buyers.Why!?
Is there a way of listing all drafts after they are completed in one action instead of one by one. Thankyou
probably a silly question but if you use the ebay postal labels do you still pay fees on postage?