In reply to Allan McDonald (Gwydyr MC): The subject of this thread is known throughout the book/climbing community as erratic. There are two sides to every story but my brief experiences of purchasing in the distant past were not too happy. I was told recently, by half a dozen climbers in the USA that he is known as "Chissler". (Chizzler)
There is a culture amongst some climbers in the US of expecting to be paid for signatures at events. This is not the case in the UK.
I understand that Chessler pays for signings and does donate to related charities.
His books are generally expensive in relation to other dealers, but at times he has some gems, if you have the dosh. I find his website an excellent reference tool.
If you look at his ebay feedback there are comments in the vein of that about Joe Simpson, so it looks like a character trait to me.
JS has signed his and many related books for me for my collection over the years and has always been pleasant and taken time for a chat on occasions.
However, I will not deal with Mr Chessler, no loss to him with my income, but I can thoroughly recommend Top of the World books in the USA.