My experience was similar to Efrem's. In my case, it involved a Lexus. I initially sent out e-mails to a number of area dealers and a number of auto purchasing web sites (never received responses from several). In addition to details on the vehicle I was looking for, I was explicit that I wanted to charge the vehicle on my Amex (after checking with Amex). I was late enough in the model year, that only one dealer actually had the vehicle configuration I was looking for. The rep was close to indignant when I reminded him that I wanted to charge the entire purchase price. They said that dealership "policy" was a max of $2,500 but would allow me to charge $5,000. If I thought that any similar vehicles were nearby, I would have walked (and maybe should have anyway).