1. For Preselling Units, buy from reputable developer, and check out the agent to see if he/she is genuinely authorized to sell the particular unit. For secondhand units, check if the seller has clean title to the unit. Ask for a certified true copy of title, and make sure there is no debt attached to it, or someone else has claims on it.

2. Ask questions, and get answers in writing. e.g. for preselling units, when will it be completed? any compensation if completion is delayed? 

3. Beware of the costs involved, in addition to the selling price of the property.

The buyer has to pay:

Documentary stamp duty (1.5%) for Bureau of Internal Revenue

Transfer tax (0.75%) for Land Registration Authority

Title registration fee (0.25%) for the local government's treasurer

Information Technology fee (a few thousand pesos)

 these are paid to government authorities. In addition, you as the buyer may have to pay a fee to hire an agent to process the documents if you do not want to spend time in the government offices, or wait months for documents to be released. Documents have to be notarized, the cost of which depends on the notary public that you use. Normally 0.1% of the selling price should be more than sufficient.

The seller has to shoulder the Capital Gains Tax (Bureau of Internal Revenue), which is 6% of selling price.

4. Before making final payment, check that the seller has paid all the real estate taxes and condominium association dues.

1.对于预售单位，从信誉良好的开发商处购买，并检查代理商，看他/她是否真正有权出售该单位。对于二手单位，请检查卖家是否拥有该单位的地契，该地契没有债务负担。要求获得经过认证的真实地契副本。

2.提出问题，并以书面形式获得答案。例如对于预售单位，何时完成？如果完成延迟，会有补偿吗？

3.除了物业的售价外，还要注意所涉及的费用。

买方必须支付：

国内税务局的文件印花税（1.5％）

土地登记机关的转让税（0.75％）

当地政府的所有权登记费（0.25％）

信息技术费（几千比索）

这些都是支付给政府当局的。此外，如果您不想花时间与政府部门打交道，或等待数月才能发布文件，您作为买方可能需要聘请代理人处理文件。文件必须经过公证，其成本取决于您使用的公证人。通常0.1％的售价应该足够了。

卖方必须承担资本收益税（国内税收局），这是销售价格的6％。

4.在支付最终款项之前，请核查卖方是否支付了所有房地产税和公寓管理费。