Kathryn's Korner is a small thirft store packed with stuff... and you'll never get anything cheaper, items are $1 each. Plus, all of the money goes to a non-profit helping homeless women and children.
It's hard to find. There is a small street called Lawrence between 4th and 5th streets. The store is on Lawrence just south of Master (maybe 2 blocks north of Girard). It is across from the loft apts and has a brown door. There is a small black and white sign attached to the building since it isn't a normal store front. Hours are Monday-Friday from 10-2.
It's a hidden gem!