This seems to be the page on the official site that is appropriate for you. It would appear that it is likely that the Autosports would be considered a set, so it might be prudent to break up the sets into smaller groups if you believe that they may be worth more than £6,000 or breach your annual allowance of £11,700. See:
https://www.gov.uk/capital-gains-tax...ssessions/sets
And don't sell them all to the same person as that may be considered as an attempt to evade paying any potential Capital Gains Tax.