If you want to keep using the $1 weekend promotions, list all your auctions on a Saturday or Sunday, for 7 days, but leave the auto relist box unticked. That way they will end each Saturday or Sunday and you can relist manually after accepting the promo again. I tend to do mine on a Sunday, that way if the promo does end (which it will eventually, because nothing is forever on eBay), then I can edit each auction to tick the auto relist box before they end.