This is one of the best examples of cashing in on retro games I've seen for a while on eBay:
First link is to Mega Turrican without a manual being sold for £149.95 by a seller called leolondinium -
https://www.ebay.co.uk/itm/224154813411
The second link is to a Mega Turrican manual being sold for £94.95 from, you guessed it, seller leolondinium -
https://www.ebay.co.uk/itm/224154841001
I'm surprised I haven't noticed other obvious splitting of games to date! FWIW PAL Mega Turrican will sell for around £150 in its complete form