The accurate prices are for completed sales. Maybe I should sell my dinosaurs, £10 at Tesco just over a year ago, lots of completed sales on ebay at over £20, and the fact that they're still in sealed boxes says I'm not desperate to build them myself 🙂
Me and my bro had a good few sets of these; you’ve led me down a rabbit hole - I hope these prices aren’t accurate:
https://www.ebay.co.uk/itm/385062840667?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=hvyj6pqbsck&sssrc=2349624&ssuid=EnSZPfqFRPa&var=&widget_ver=artemis&media=COPY