These are either prototypes (models before serial production), models from photo shoots (with small optical blemishes), furniture that comes back from various trade fairs, or individual pieces that were sorted out in quality checks due to small fabric defects etc.
Remaining stock also includes outdated models or other such products that have been returned due to shortcomings related to measurement, colour, material etc. The price is reduced according to the amount of the defect/damage.
No changes are possible. The rule is simple “Bought as found, cash and carry” (no credit cards).