Early Currency Trades

The first time I remember being conscious of money being worth more than its face value was at about the age of eight or nine.
I had two things to sell when I accompanied my mother and father to Glasgow’s famous Barras market one weekend in probably the late 1970s.
My father, in particular, was a keen amateur antiques dealer and the Barras was a Mecca for him to buy and sell items.
On this occasion, I had a tiny metal model of a boat which I had found half buried in mud in a swingpark near my home and knew looked very old.
As there were several vintage toy dealers at The Barras, I thought one would be able to tell me about the boat.
Sure enough, although the first was too coy to give me any information about the little toy I had brought, another said it was a model of a tug boat which had been included as part of a larger model of the Queen Mary. I can’t remember what I was offered but I eagerly accepted the money for an item I had dug from the ground the previous week.
The other item I had was a large National Bank of Scotland five pound note from (I think) the 1940s or 50s. The first dealer told the eight or nine-year-old boy in front of him that the note was only worth a fiver but I told him that I was sure I could get more than that for it.
Another nearby dealer offered me eight pounds and I couldn’t resist going back to the original dealer to tell him about this and ask for his best offer. Sure enough, he offered me eight pounds and fifty pence but when I told him that I was off to allow the other dealer to think of a new offer, I was told that the £8.50 offer would not be valid on my return.
This hardline approach worked and I agreed to let the note go for this amount.
Years later I was reminded of this early currency trade when I was fascinated by the display of a banknote dealer at an antique fair. By this time I was mainly interested in old postcards but antiques and curios of many kinds held a fascination for me.
I was astonished to see a note similar to that I had sold for £8.50 all those years previously offered for sale at more than ten times that amount and initially I wondered if the dealer who had bought it had taken advantage of my youth and naivety but I was more experienced and realised that the sale had given me valuable experience of negotiation and bargaining at a young age.