.
...does it have a 3 speed hub ? If so, there's a date code on that hub shell. The age has a lot to do with value. After Raleigh bought Dunelt, they produced a lot of bikes that were lesser Raleigh Sports type bicycles. Those are pretty common, thus unlikely to be very valuable.

OTOH, something made before Raleigh bought them would be worth more to a collector.

It's impossible to tell you more without some photos or a better idea on age and condition of the bike.