I'd have to agree that those front tires look so worn down for only 193 hours. I can only guess that the rear tires are brand new. I wonder if the dealership got it in on a trade or was for personal use. Either way I wonder what it was used for day in, day out...especially for it to have that kind of wear. Just do like bordercollie suggested and check the fluids, see if they are at the correct levels, smell normal or burnt. Checking the blowby is a great place to start. Sometimes if the deal seems too good to be true, it usually isn't.