Casio G-shock GM B2100 GD-5AER

I bought this watch with the intention of buffing out the scratches on the glass and the bezel, an easy if time consuming job. However, the seller neglected to say that there were links missing from the watch band. As best as I can tell there are 4 or 5 links missing. I've tried to measure the inside of the band as accurately as I can and it is around 18cm, maybe a touch smaller. Unfortunately, my wrist is 20cm, so it's of no use to me. The missing links and scratches are reflected in the extremely low asking price, it's a £500 watch new. There is a big scratch on the bezel and glass and smaller scratches on the rest of the watch, as shown in the photos. Still looks great on the wrist though and full working order.

eBay