I went ahead and wrote back to the odd email saying: "I'm very sorry but my sales records show that this item was sold to another eBay I.D. and security issues prevent me from discussing it's sale with anyone but the buyer."  

Almost immediately I received a very curt reply from the actual buyer.   

I'm thinking it may be more or less a scam to avoid eBay buyer rules, e.g, attempt to get a partial refund or have me send them more than they actually bid on. 

I have offered a more than adequate solution so we will see.  Beware sellers.  

I've been buying and selling on eBay for 15 years yet selling to low feedback eBay buyers has only very recently become a nightmare for me.  I'm seriously thinking I will cease to sell to these folks.