I just unloaded about most of my textbooks on half.com.
Advantages:
- set a price and wait.. no checking auction bids, meeting reserves, etc.
- no expiration date
- easy to compare prices that others are listing same books in same condition
- very straightforward and simple
- no dealing with non-payers. if they want it, they have to pay for it before the listing is taken down
Disadvantages:
- it's still eBay
- the shipping charges that Half.com reimburses you are usually off. Sometimes it will work out to your favor, maybe giving you an extra $.10-.50, but usually you will end up paying $.50-$1.00 more than they give you.
- they take commission for each sale
- they pay you bi-monthly, so money from a sale might take several weeks to actually be deposited in your bank account.
On one particularly cheap book ($1.00?) that the buyer chose expedited shipping that I offered, I pretty much ended up paying a dollar to get rid of it (After shipping and commission). More expensive textbooks that I sold ($~100) returned a much higher percentage to me, as opposed to the cheaper books (<$10).
It was really great though. I had this huge box filled with books that was taking up space in my apartment. I didn't want to sell them back to book stores because they give you nothing for the books pretty much. I listed on craigslist for awhile but all I got were lowballers. I put 31 books up on Half.com in November and now I have maybe 7 left (all of them are $1-$10).
edit: I forgot to mention that in most Half.com transactions I don't get feedback as a seller. I've left feedback for every buyer though. Out of all my sales on Half, I have only gotten maybe 3 feedbacks in return.