Smauggie correctly said that
Quote:
What he is really saying is that North American dealers sell the material at a percentage of catalog, when often times they are worth full catalog or more.
But it goes further. Scott fails to list a number of varieties that Gibbons
does list. A prime example from Barwani:

Now, I've no idea what this would be valued at in Scott, but
if I was selling, and I most definitely am
not, I'd confidently expect to get the full Gibbons value of £3000 for it.
So, there is definitely scope for arbitrage, if you have the up-to-date, relevant catalogues.