Is the ad an actual ebay listing or is it posted to their classifieds? You can list animals of all kinds for sale on ebay classifieds and rescues use that service too. If it's a Kijiji ad...is ebay connected to Kijiji?
They must be...I just typed in
eBay Classifieds (Kijiji) - Post & Search Free Local Classified Ads. and it brought up the page for ebay classifieds.