found it! http://world-coins-dealer.ecrater.com/p/1551846/greece-1966-50-lepta-coin-km88-greek Apparently it goes for like $20 nice.
Condition is everything regarding the value of coins. If yours is pristine, uncirculated it might be valued at $24 but if it has wear.....well: http://cgi.ebay.com/GREECE-50-LEPTA-1966-1-DRACHMAS-1971-GOOD-GRADE-LOOK-/270691996570 http://cgi.ebay.com.au/GREECE-2-Greek-coins-50-Lepta-1966-1-Drachma-1959-/310308012723
thats a great price barry over here they are usually found in the bargain trays for around 50p..........think i'll a job lot and sell them to collectors in the USA and canada.