Thank you for submitting your item for appraisal. This appears to be a mixed media structure combining various modern materials. In itself it has artistic merits, but the artist is completely unknown to the established art market. There are no auction results, no exhibitions, no major gallery backing the artist. To post artworks on instagram is a good idea, but might not help to establish a market value. The estimate is based on similar mixed media installations by unknown or lesser known artists sold at auction.