Sometimes homes are placed on the market in "As Is" condition. This usually means the home has some things that need to be attended to, but the seller has no intention of fixing anything, so don't ask!
The seller may not have an interest in fixing anything in the home or may not Have the funds to do so. Typically, an As Is sale will pull the ultimate price of the home down a bit to more than cover expected fix up costs.
So, should you list your home As Is? Well, the best answer in real estate is, it depends. It depends upon what the issues are, how fast you want to sell, funds you may or may not have available to you to spend, and more. The best advice is to consult with a professional real estate agent to determine your best course of action.