I had a pretty good side business going on last year selling books on Amazon. I'm actually going to pick it back up here shortly, because I want to save up to attend the national meeting of my hobby group next year. I've also sold stuff to Half-Price Books (HPB) in the past. Here are some things that I have learned from this process:
- Mass market paperbacks are worth almost nothing on the secondary market. It doesn't matter if they're part of a series or if they're in great shape, they have almost no value. Getting $1 for three of them at HPB is pretty darn good. The exceptions to this I've found so far are anything A Song of Ice and Fire (Game of Thrones, etc) and anything by Terry Pratchett, for some reason. To recognize these, the cover price is around $7.99.
- In contrast, trade paperbacks are sometimes quite profitable. These are the books that have a cover price of $14.00, $16.00, or some other round number. I buy some of these for $1 at Goodwill and resell them for around $4 or 5. Non-fiction sells better than fiction, but sometimes you get lucky and find something that people really want to read.
- The books that I've had the most success with on Amazon are textbooks (found a brand-new calculus book at Goodwill for $2, sold it the next day for $65 with expedited shipping), "creepy Jesus books" (books about how Jesus is the one true way and you will only achieve true happiness through Him), weird old art books, and anything on a niche subject.
- The sales rank of an item on Amazon will give you an indication of how quickly or likely something is to sell. I've found the following intersections of sales rank and time to sell to be generally true:
- 10k or less: 24-48 hours
- 10k-50k: 2 to 4 days
- 50k-100k: 1 week
- 100k-1million+: anywhere from a month to a year
- Also, you want to make sure the book you're listing is worth enough to make it worth the trouble of listing it. I use the following criteria for my book sales:
- $3.00 - 40k or lower
- $4.00 - 60k or lower
- $5.00 - 80k or lower
- $6.00 - 100k or lower
- $15.00 - 500k or lower
- $20.00 - 1,25million or lower
- $25.00 - 3million or lower
- $40.00 - 4million or lower
Now I like looking through books, so I'm willing to spend the time hunting them down. For the books you have in your house already, you should examine their sales rank on Amazon to decide if you should list them or not. List the ones that are at the appropriate intersection of price and sales rank and don't bother with listing anything that sells for $0.01. Take the rest to HPB - a full reusable grocery bag should net you about $20.
The really nice thing about Amazon is that you don't pay any fees until your item sells, and you can print out the postage right from your computer. When I was really cranking books out, I would pack the books at my house, print out postage, and simply drop everything at the post office. Or in a mailbox near work, if I couldn't get to the post office before I went to work.
Let me know if you want to know more - I'm full of advice on this topic. :)