Henry received a Toys R Us gift card for his birthday from a family friend. One morning after reading his current favorite book (Big Machines), I asked Henry if he would like to use his birthday money to buy a truck. He is currently very interested in machines and animals. He received an ant farm for his birthday, so I figured a truck would make sense to complement his interests.
First we went to How We Montessori to figure out which brand of trucks Otis and Caspar have. We were elated to find out that the trucks they have--Bruder--are available on Amazon. Henry and I scrolled through all the different options and read many reviews. We also compared prices. We knew that we only had about $25 to spend.
One we found the truck that fit our budget and had really positive reviews, I searched for it on the Toys R Us site. Sadly, it cost $5 more than Amazon, would have to be picked up at the store, and didn't actually seem to be available.
That's when I decided to explore my options for selling the gift card in exchange for credit. I found this article which summarizes the main sites for selling back gift cards. I poked around on various sites and realized that Plastic Jungle was going to give me the best return on the card. They took $4 and gave me $21 of Amazon credit nearly instantly.
After a few very intuitive clicks, I was able to buy the truck on Amazon. I spent $5, which I would have spent at Toys R Us (since the truck was $5 more expensive). I definitely recommend the site, especially if you have gift cards to stores that you don't really want to use.