A funny story - how I got my first Stanislaw Lem book from a Washington Square park bookseller.. Guy had a table with a wide range of second hand books mostly

A funny story - how I got my first Stanislaw Lem book from a Washington Square park bookseller.. Guy had a table with a wide range of second hand books mostly sci fi. I carefully picked over the pile and chose some of my favorite authors - some that were quite hard to get. When I went to purchase about three books, the guy said "OK since you are obviously a man with taste in SF I'm gonna let you see my other 'special' stock" - and out came a small tray of books from under the table. Not previously on sale. Maybe it was just a clever marketing ploy - but this is how I found my first Stanislaw Lem book (which he recommended). Since then I've always tried to buy Lem at SF second hand stores but actually very hard to come by (in English). I did buy a brand new copy of 'His Master's Voice' the other day and was not disappointed. Don't think he actually wrote that many SF books - I think I have them all now but maybe I'm mistaken.