I don’t need a wife and a realtor will cost you less and cause you less headache.
You can always use a realtor and negotiate a smaller commission if you don’t need very much of their time. If I have already shopped and picked the house I’ll use a family friend and negotiate a price for them just to negotiate the contract and finalize the paperwork, it takes them a few hours and they usually end up paying for themselves and then some in savings.
People don’t need a stock broker, some prefer it, others do it themselves. It is all what you feel comfortable with, for piggintonians, this is a hobby of sorts but the rest of the world is probably better off using one.
Now for selling, I always use one, I have a job and showing my house isn’t it.