It sounds like you're doing everything right.
There's no need to drive yourself crazy. At some point you have to decide if the stress and aggravation and effort are worth it. How much do you value your time and sanity? I realize I may get flamed for this, but you can find the Wii for sale on Amazon Marketplace and ebay and Craigslist, but you will pay more. The law of supply and demand.
I wonder if the reseller prices will rise or fall as Christmas approaches. On the one hand, demand will increase as buyers get more desperate. On the other hand, the resellers may have significant amounts of Wiis in stock, which they will want to get rid of by Christmas.