Honestly, we've looked at prices of movers, and then estimated how much stuff we have here in our simple 1-bedroom apt here in Silicon Valley. It turns out that hiring movers is more expensive and will cause a lot of headaches, rather than just selling our furniture on craigslist.com and sending our clothes in regular parcel mail. We'd drive in our own car with just the necessary clothing and vital "stuff", the rest can be sent via mail.
this is what we've concluded. others' experience may be different.