If you look at my completed items, I have had quite a few of Caithness Colin Terris Space themed early limited edition paperweights recently, complete with silk lined boxes and certificates. These are late 1970s early 80s weights, edition sizes from 1500 to 3000. The average price has been about £40-50 so I would say that your offered price is way way way over what you could expect to pay on ebay for an immaculate weight.