You are doing them a favor, but keep in mind, this FJ will sell no matter what.:wink^Good advice
I went in on the last day of the month just to browse for my wife and the dealer went into a panic when we started to walk out. Actually pulled our keys off the table where I had set them and "misplaced" them until I told them just to call me a cab.
When I negotiated my FJ recently I went over the vehicle with a note pad, wrote down everything that wasnt OEM and asked to see the service records for the installation of everything else. If I found anything wonky (and I did, deck screws through the seat backs to hold an amp) I used that to call everything about the vehicle into question. Dealer dropped thousands off the asking price before we started "haggling".
Go into it like you're doing them a favor, because you are.