These guys offer you surveys and you get $3.00 for each one. They are sometimes kind of long, and they only offer 2-4 each month, sent to your e mail, but it's been keeping me in horse treats. I have them put the money directly into my paypal, so sometimes I forget about it and I will end up with $30 or $40 in there.
I can't remember how you go about becoming a member, I think you need a referral from another member. If this is something you want to do, let me know and I'll see if I can refer you.
Also, have you tried Ebay
I used to dabble there when I had time. I would go to thrift stores and grab a handful of their books which were like 5 for $1.00, Stephen King, Dean Koontz and Young Adult mystery or horror always went well. I would only make a few bucks a day profit, after shipping, but again, it was extra money and I just used it for gas or some little doo dad I wanted.