In a sense my question was rhetorical because like many of you, I think that honesty is more valuable than mere money.
I am glad I told him about the book... although that comment about me being paid to look at books made me laugh. I hadn't thought of that

I heard a story a while ago about an old codger who had a Vincent hitched to a chair. He used to be a regular site around Cowbridge on a sunday, but for many years the Vinny lay idle in his garage.
One afternoon in the early 90s a neighbour saw a sign in the local shop window saying "Vincent for sale, £80". He dashed back to the codger's house to tell him not to be so daft and he arrived to find the sidecar dumped in the hedge outside. The buyer had turned up, knocked him down to £75, removed the chair and thrown the bike in the back of an estate car and made a hurried exit.
The codger said, "but it only cost me £150 in the 60s and I thought it must have lost some of its value since then".
This raises lots of questions about the nature of 'value', but at the end of the day, some bloke knowingly deprived a seller of the true worth of the item.
GC