Are you sure these homes are for sale? Because you found these on a real estate site that indicated they were in a foreclsoure process does not mean they are 1) still in a foreclsoure process or 2) for sale.
If these properties are listed w/ a broker, I suggest you find a buyer agent to represent you in lieu of working w/ the agent who is representing the seller. The agent working w/ the seller is representing the seller to get that seller the highest price and best terms. You want a buyer agent working on your behalf.
If you found a list of foreclsoure properties, keep in mind these seller may have no interest in selling.
The fact that properties appear on Trulia as foreclosures does not mean they are for sale. It only means that there is a legal action pending.
Some pre-foreclosure properties are for sale...others are not. If the property is not lsited, you can try to approach the property owner on your own and inquire if they might be willing to sell. I strongly recommend you hire a buyer agent to represent you instead of approaching the property owner on your own. Owner w/ properties in foreclsoure are approached by many strangers, some with a shortage of scruples. The owners become quite skeptical. A property owner may be more responsive and communicative w/ an agent.