Check the ones listed in this page:
toyota altis | Buy and Sell NCR - Metro Manila | Ayosdito.ph, and the next, and the next... Maraming unit na pasok sa budget mo bro. Negotiation really depends on the seller. If he's been trying to sell it for a long time, siguro mas magiging negotiable siya, or if you are able to pinpoint certain faults (yung mga madali pang ayusin ah!). Just visit the car first, and you will see if the car is really worth the money, and then negotiate from there.