Private and Public versions of the same post/page

I’m using WP as a CMS, and provide a sort of catalog of objects I make for sale. I’d prefer to not use a separate table or even db for my inventory, so I’m thinking that each post or page could serve to represent each item.
I believe that custom fields will suffice to hold the extra data I need about each item, but I need a way to hide many of these fields from public view. My question, then, is whether it’s possible to have both a public version and a private version (for myself) of the same post/page (i.e. item), as in different views of a db table. I’m trying to avoid data duplication.
Thanks.