I'd advise ya to save your money. There's nothing magical about this stuff. My credit union has a free service whereby you get a price that is the actualy dealer invoice price plus $50. But even then, you can do better. For instance, I paid $360 under invoice on my vechicle and the dealer made $482 on the sale. Note that that's thin enough margins that I'm amazed the dealer went for it.
The secret is that dealer invoice isn't dealer cost on a vehicle. There is (at least as of 3 years ago) a "holdback" amount the factory pays to the dealer on the vehicle that is 3% of invoice. So actual dealer cost is typically 97% of dealer invoice. Less, if Subaru is running any factory to dealer incentives.
Its best to start negotiating at actual dealer cost, and work your way up from there to allow the dealer to make a fair profit. Don't forget to allow them to make something, ortherwise don't be surprised if they tell you to have a nice day.
Lots more such info here, and what to watch out for at the dealer:
Enjoy your new car buying experience. In no other purchase does the consumer have such power to know the exact cost a dealer paid on a commodity item you can buy from several different dealers!
I stumbled upon a very motivated salesman at the end of the month who lobbied his general manager to sell me a car that made the dealer only a few hundred dollars... So I paid well below invoice cost. I got to a price I was comfortable with, and then said "okay, make that price happen and now throw in the factory car top carrier (your cost on it is $238 I believe), and I'll cheerfully buy from you today."
The salesman was near the end of hte month and needed a few more units to get to some nifty vacation for a weekend plateau and he got the approval on it.
Remember, it's a new car. These are mass produced items. There are lots of them at different dealers. :-) ANd don't fall prey to the high profit extra crap like rustproofing, undercoating, the extended warranty at the dealer (same Subaru warranty can be purchased up to 3 years from your purchase date, and from other dealers that won't bilk you), or dealer installed options. All are loaded with profit.
Best Regards,
-- Todd H.
2001 Legacy Outback Wagon, 2.5L H-4 Chicago, Illinois USA