Baby pajamas and rompers

Selling size 56 Lindex pajamas, muslin romper, and knitted cotton romper. Four pajamas have appliques on the back, one without appliques, no stains or other defects. Muslin romper without stains and defects. The knitted cotton romper has a small, practically unnoticeable stain on the back from the time of purchase (bought on sale) (see picture), I've tried several cleaning agents, but it remains. I don't sell clothes separately, selling all together.