try <!-- w --><a class="postlink" href="http://www.yesterdaystractors.com">www.yesterdaystractors.com</a><!-- w --> and type in OLIVER under the "for sale Photos"  ....you should come up with a few.  If you look around on that site, there is also a TRACTOR PHOTOS section where subscribers can send in their tractor pictures. I have not checked out this part of the site, but I would suspect you will find something.  What sort of crawlers are you looking for?
                                    Cal