Hi, depends on the type of tin if
Webleys, if it is one of the black tins on the left,
maybe £5-8 on that auction website (sometimes more, but there have been a fair few N.O.S. on there recently which seem to have killed off interest). Both a tin collector, or a person with a Webley pistol set who needs a tin to "fill the hole" are the likely buyers. They also work well "true" .22 older guns, ie. Webley Mk3's and Airsporters.
The
Caledonians were a cheapish pellet at the time, and they don't seem to attract the prices of major names to collectors, but are fine for plinking out to 20 yards or so, again in older guns. Some people report they shoot very well at garden ranges, as good as most stuff, but out past 20 yards they will not stand up against more recent offerings.
Value..£3-5 maybe going by recent sale completions.
With the bleedin' price of new pellets these days, I am quite happy to burn up old stuff like the cali's when messing about with knockdowns or tins etc. where pellet on pellet is not needed
As always, if you do shoot this old stuff, clean your barrel first, and get a few dozen shots through it to give them the best chance, you may get a pleasant surprise, especially at close range!
(all the below groups are 5 shots at ten yards with an old BSA mod D rested on a rolled up tent!)
http://www.flickr.com/photos/3122848...7616669873978/