URLs are not allowed in the answer portion of questions, however you can find many good websites by using Google. To list a few here, there are: Equine, Equinenow, dreamhorse, localhorse, petfinder, horsetopia and a few others. All of these sites end in a dot com.
There are also a number of sites where you can look at free horses, off track Thoroughbreds (OTTB), and many breed registries have breed affiliated classified
ads for members.
There are also sites and on line auctions as well as various lists on Yahoo etc. that
deal with horse sales.
www.pro-stallions.com and www.horse-gate.com
The best horse buying website out there is Horsetopia.com. Just make sure the horse is local, and you can pick it up yourself. Never have them be shipped.
Your Horse is an UK based website that provides horse gear and information for horse owners and riders. On their website one can purchase horses for sale, horse gear, and can subscribe to the Your Horse Magazine.
somewhere on the my horse club website
There aren't many reliable web sites. Try subscribing to a good horse magazine like: Young Rider or Horse Illustrated.
One can purchase horse supplements online on the official farmer's union website. A dedicated agent will be happy to help you select a horse supplement that best fits you.
The best choice for your situation would be to make use of a specialty store for horse trailers. The absolute best online at the moment can be found over at http://www.horsetrailerworld.com/home/newhome.asp
There are many out there. The best one I've scene in Horse Isle Guides on ProBoards. There is a link below.
The best place one can watch funny horse videos is from YouTube because the biggest selection can be found there. One can also find funny horse videos on the website 'HorseCrazyForever'.
try www.horseland.com
The website "At The Races" is a horse racing website. They have racing results, best odds, tips, analyses, race evaluations, stable tours, ATR predictions, speed ratings and much more to offer.
www.breyerhorses.ca has great prices. You can buy it on a Breyer Horse website, or on a resale website like ebay.