It varies by dealer.  I have been able to charge $3000 toward two Prius and
$2500 on another. I've also charged $2000 toward a used 4Runner. This is at
4 different Toyota dealerships. If one Toyota dealer were to allow me to
charge the whole car, it would get my business, since they would be taking a
1.5% to 2.5% hit, depending on type of credit or charge card and the volume
they do. My brother put a entire used Nissan truck on a credit card, but he
was ripped off on the asking price.

Another ploy in being as cheap as me would be to ask for add-on accessories
not included in the sticker at dealer invoice, e.g. cargo net, cargo mat, or
ask for free service, or reduced extended warranty price (I tried). I was
able to negotiate NAV at dealer cost for my 2001 Prius, but the job was too
complicated for me to do. He put that $1600 part cost on a dealer signed
promise statement. In retrospect, I wish I researched the Solara convertible
XM Satellite radio installation or part purchase for the Prius and made that
part of the deal.

Bill

That is not a good approach. Most Toyota dealers have a cap on what they
will accept on a charge. Usually it's between $2000 to $3000 or possibly
equal to the most their parts department will take for a charge. I have
paid the maximum I could on a charge with five different Toyota dealers
for both new and used vehicles, including three Prius models. The dealer
is giving up about 2% profit for whatever is charged, so if you find one
willing to take the credit card for the entire amount, you were probably
paying way too much anyway.