Ok, so this might of already been posted, but a nice way make a buck.
There's this app on the android market called checkpoints. You check into a store, scan items, and get points. you can redeem them for prizes like amazon gift cards.
So i don't know if this is agaisnt the rules or not, and tell me if it is, but you can go onto a site that lists the barcodes for the items, scan it with your phone, and get points. I'll post the site if this is ok with the rules.
From the site: TO PREVENT THE POSSIBILITY OF YOU BEING BANNED, I RECOMMEND TO NOT SCAN DURING STORE CLOSING TIMES, SCAN AT RIGHT INTERVALS. FOR EXAMPLE DONT SCAN 5 ITEMS IN LESS THAN 10 SECONDS DURING 1:00 AM DURING STORE CLOSING HOURS! ALSO SCAN AROUND 0.0.5 MILES AWAY FROM THE STORE AND IF YOU USE LOCATION SPOOFER, DONT JUMP FROM NY TO LA in 5 MIN. ALSO SCAN BASED ON CATEGORIES, LIKE SCAN ALL THE BREAD ITEMS BEFORE MOVING ON TO THE HEALTH & BEAUTY SECTION. IF YOU DO IT RIGHT, YOUR CHANCES OF BEING BANNED WOULD BE SLIM TO NONE