The Trainers' Mail (92A / 108) card can be found in the Roaring Skies set.
Recently sold 1 times and based on those sales is worth around £0.04.
Currently, there are 2 open listings for this card on ebay.
This card sells in the range of £0.04 to £0.04, making it very stable.
This Uncommon card was illustrated by Toyste Beach.