What I so appreciate about using 1-800-Got-Junk is that I can just point to it all and forget it. It will all be gone a short while later. I can then continue with refurnishing my place.
If you've never used such a service you can easily think that you could rent a truck and dump it all yourself, but I am of the belief that once you try it you won't want to deal with all the hassle anymore. It makes me think of air conditioning; People don't really want to pay for it but once they do they wonder how they ever lived without it.
If you feel your time is valuable like I do, and you would rather just have it all gone so you can focus on the more interesting aspects of minimizing your environment or totally renovating it, then you will want to use this service.