A few of the Olympic coins are worth a couple of quid, even in used condition. There is also the odd £2 and £1 worth (consistently) more than face value, and no one really seems to care much about condition in the world of decimal collectors!
Get my book, all the answers are there Matt...
https://www.amazon.co.uk/Collectors-Coins-Decimal-Issues-Kingdom/dp/0948964782/ref=as_sl_pc_qf_sp_asin_til?tag=predecimalcoi-21&linkCode=w00&linkId=&creativeASIN=0948964782