That is a pretty cool English Roadster-type bicycle. The red color helps in desirability as so many English bikes were drab greens, browns, and blacks. Find the date code on the rear hub and you will probably have a good idea of when it was made. If that saddle is in good condition it may be worth more than the rest of the bike - I would research that aspect.
If it cleaned up nicely, it would bring $100/$150 in my shop. Not a very helpful picture and there is too little info from you - therefore too many unknowns to say anything else of substance about this particular bike. Rarity/scarcity does not necessarily = desirability/value.