Exactly; you get what you pay for when it comes to new instruments. The spelling mistake the seller of the third one made probably says it:

"For those who are speaking in real English its puker!"

Generally, it's unwise to buy instruments online until you know a lot more. As has already been said, try to get someone who plays to visit a few music shops with you; and consider buying second hand. You may not get shiny, but you'll have a better chance of winding up with a reasonable beginner's instrument (though for the sort of price you mention you'll need a fair bit of luck as well).