http://www.equinehits.com/horses-for-sale/horse-219627 (not a great picture, but could be an eye-catching kids pony.)
http://www.equinehits.com/horses-for-sale/horse-148238 (cute cute cute... however, 3 and 14.1hh, might be risky.)
.. I'll look for more later
ETA - with the market the way it is, people might take a lot less for horses than they normally would... I would honestly look at horses up to $2000 or maybe just a little more, the owners might come down in price if they're keen to sell.