I can't believe some of the people on there.
A rottie/mastiff mix up for stud more than likely unhealth tests.
http://www.preloved.co.uk/fuseaction-adverts.showadvert/index-1031910234/dc49530c.html Boxer for stud registered with the dog lovers registration club so basically not
http://www.preloved.co.uk/fuseaction-adverts.showadvert/index-1031899827/9c839df9.html I want a small dog that loves everyone, is perfectly trained and I want it for cheap
http://www.preloved.co.uk/fuseaction-adverts.showadvert/index-1031910205/1e56311d.html And some of the most random mixes I've ever seen bred on purpose chi/german spitz oh its just like a pomeranian, springer/northern inuit who admittedly were fully tested and an accidental litter.
At least I couldn't find anything too bad on there.