The people who answer questions on these boards are just normal
users like yourself.
If you suspect shill bidding or some other problem there is a link
on each listing where you can report it to ebay staff.
I looked at that listing and it don't seem to be shill bidding .
I think the other bidder just bid his max and quit.
You will also see by checking his bid history that he is
bidding on several other similar items from different sellers.