Presenting your home isn't that difficult. After all, you know it best. Unfortunately, some people will make appointments and fail to show up. Not so bad if you're already home. But a real bummer if you took the morning off specifically to show your home.
Some sellers prefer to control the process.
It's easier to gauge buyers intentions by talking directly with them. One potential problem is knowing whether a buyer is financially qualified to obtain a mortgage. Depends on how much time and talent he can bring to the sales and marketing tasks. It does take quite a bit of effort to sell most homes. He shouldn't underestimate that or the time he'll need to devote to it.