I moved recently and have boxes available that were only used once. Most of the boxes are flattened and the tape has been removed. There are:
31 small Home Depot boxes
12 medium Home Depot boxes
4 large boxes
1 wardrobe box with metal bar
Miscellaneous narrow boxes (not flattened) that work well for a flat-screen TV or artwork
Some large pieces of packing paper for dishes/breakable items
I'm located in Jamaica Plain and mostly work at home. You would need to pick them up; I can help bring them to your vehicle.