听下面一段较长对话，回答以下小题。
【小题1】What is the conversation mainly about?

A．Why to buy a used car.

B．How to select a used car.

C．Where to buy a used car.

【小题2】How did the man get his last used car?

A．On the eBay.

B．From a friend.

C．In a car market.

【小题3】Where will the woman find the largest selection of cars in one place?

A．Craigslist.

B．CarMax.

C．eBay.

【小题4】What is the best time to check car information on the noticeboard?

A．Winter vacation.

B．Spring vacation.

C．Graduation season.