Questions about AUCTIONS

I'm currently running an auction--no problem with it, I will see it through just like any other auction--but I'd like to get some questions answered. I did a search in the terms of service file on the word "auction" but didn't see any answers. I also read a blurb about auctions in an astromart post in the refractors auction site, but I'd still like to be clear on procedures. This is my FIRST auction, I have a good sense of how the classifieds work, but not the auctions.

1. Why is there no "seller pays shipping" option? (I didn't see one.)

2. What if one decides to cancel the auction and keep the item?

3. What if one cancels the auction and re-sells the item on the 'mart?

4. I have seen ads in the relevant sections for an AUCTION (I have two, one in refractors, another in focusers). So I take it we're allowed to do that, would be nice if there was a click-thru to the auction.

5. In my case, the two ads announcing the auction are paid-for ads, and it seems that I have one auction credited to me, I'm not sure why, so I'm using the free auction. I trust it is OK, if one buys a set of auctions, to use the free ad choice to announce the auction in progress?

6. Moving away from the auctions topic, I guess there isn't a whole lot of rules on the pay-for-ad option, some of us do it and some of us don't, I buy sets of ads and use them, typically, for the first listing of an item but not if I re-post it later (usually at a lower price). Also tend to punt the payment on low value items. I think $2.00 is a good deal but on items under $50.00 the margin is disappearing fast...

thanks
Greg N