Depending on how it shoots, and the general condition, In my opinion you should be looking in the region of £50 - £120, could be more if you had the original box and grips.
Hope all this info has helped
hi would you be able to help me i too have the same webley junior but stamped with 195 on the end and underneath the grip, it also is stamped with an A near the trigger. it has a black plastic handle. any ideas of the price and date??