I've taken 2 things to an I Sold It store. I took them because they were large and I didn't want to mess with shipping. One item is still for sale and the other sold for a good price. I had a coupon to try the store for the first item that waved most of their fees and then when I got that check, they gave me another coupon for $5 off their fees so I used that on the second item. My only complaint is that it took 3 weeks to get the check once the item sold. The lag time is, they wait to see if the buyer is going to send the item back or not. I sell on Ebay myself and shipping stuff out is a hassle and I Sold It does it for you. So, I'm using the store for my bigger items and selling the smaller items myself.
By the way, I just started selling on Ebay because I read on this board that a lot of people are doing it to earn money for their Disney trips. It's worked great for me as we have an unplanned Disney trip coming up in late June. My daughter's AAU basketball team is going to be playing in a national tournament at Wide World of Sports and we weren't planning on going to Disney this year. Ebay has helped off set the unexpected costs so I'm glad I read about that tip on this board!