I'm in this same predicament. I'm about to purchase an '05 TSX with Navi from the dealer. It's a certified pre-owned that comes with the 6 year/160,000 km power train warranty. I already signed the papers and put down an $1100 down payment on the car. I'm suppose to pick up the car tomorrow (or Tuesday if everything is done), and the rep just called me now and asked me if I wanted the extended Bumper to Bumper warranty for 6 years/160,000km for $1300 originally $1800-$500 cause it's a CPO.
I'm tempted to get it, but at the same time mad cause the sales guy didn't do this while we were negotiating and I already put the down payment so I sort of feel stuck. I told them I didn't want my monthly payments to be over $400/mth. We got it down to that, but now they just called me up for this. Suggestions would be great, is this worth it.