Art. 2 CISG
This Convention does not apply to sales:
(a) of goods bought for personal, family or household use, unless the seller, at any time before or at the conclusion of the contract, neither knew nor ought to have known that the goods were bought for any such use;
(b) by auction;
(c) on execution or otherwise by authority of law;
(d) of stocks, shares, investment securities, negotiable instruments or money;
(e) of ships, vessels, hovercraft or aircraft;
(f) of electricity.
The Secretariat Commentary on Art. 2 of the 1978 New York Draft, predecessor to Art. 2 CISG, gives insight into the drafters' unterstanding on the eve of the 1980 Vienna Diplomatic Conference.
Overview of case law on Art. 2 CISG: UNCITRAL Digest
The UNCITRAL Digest on the CISG can be used as a starting point to discover the relevant case law on this article.