1. A computerized system for sale of products having non pre-catalogued parameters in a multi-lingual environment wherein a buyer and a seller communicate in different languages, the system comprising: a non pre-catalogued parameter database; a listing engine operative to prompt in a first language a listing seller to enter multiple non pre-catalogued parameters relating to a product being listed and to store said non pre-catalogued parameters in said non pre-catalogued parameter database; and a non pre-catalogued multiple language parameter description engine which is operative to provide human-readable descriptions of said non pre-catalogued parameters in at least one language other than said first language.