i am also facing same issue with other seller. please try to contact with the seller and ask him to remove the pictures.
If he does not respond, You can send complaint to eBay through 'report item' link or mail to inrswebhelp@ebay.com.
But they may not resolve this issue.
Keep posting your item# & copied item # along with your original pictures.
Use Picasa or some photo editing software for watermarking your pictures, that is the only solution.
Buy branded tools at cheaper prices from http://stores.ebay.in/machpowertools