The concept of film memorabilia began with such things as scrap-books, autographs, photographs, and industry magazines, but quickly expanded in the post-World War II era. Collectors began seeking out original advertising material, and the classic "onesheet" movie poster became a popular object to own for any given film. Other material, such as lobby cards, international posters, personality posters, and glass slides also became sought after. Today, the field of film memorabilia collecting has grown into an internationally recognised community of increasingly serious collectors, and also commonly includes movie props, costumes, and production materials such as concept art, call sheets, and screenplays. Many popular films have their collectible items sold via independent, online movie memorabilia stores, web auctuons, and at film studio charity events for thousands of dollars, while memorabilia from such franchises as Star Trek and the James Bond films often net millions of dollars in revenue from auction houses such as Christies and Sotheby's.
When the collecting of film memorabilia was in its infancy, collectors had to rely on a handful of news magazines that were full of various sellers offering mail order catelogues or asking to buy bulk lots, or particular items of interest. Occasionally, events would be organised which were structured around a live auction — these, while fewer in number today, still occur, and one can still buy memorabilia in person from trusted sellers on-site. The community was also fairly fragmented, with collectors and dealers spread out across the globe and no real consistent and reliable way to communicate with one another; the development of the internet changed this situation significantly.
In the early days of the internet the larger community began to get in touch with one another through UseNet newsgroups, some of which still exist today and continue to provide information (e.g., alt.binaries.pictures.movie-posters). As the internet grew, and more people began using computers and the internet, collectors began communicating in ways never thought possible. In 1995, popular on-line email group MoPo was formed, creating a central place for anyone with email to keep in touch about things and events important to the community. This group continues to provide information to new and old collectors alike. By 1997, the community had changed forever; eBay was quickly becoming the alternative marketplace after two years of steady growth. All of a sudden people had a way to sell pieces of their collection easily, and with consistently better results. Professional sellers took notice, causing many of them to close their bricks-and-mortar businesses and focus their attention completely on internet sites and the future of the on-line marketplace.
In the early days of internet selling, prices varied widely. One could find posters normally valued in the hundreds of dollars selling for twenty dollars, or, alternatively, find posters normally valued at twenty dollars going for a hundred, or more. Today, the market place for film memorabilia has mostly stabilised. While one can still see a rare film poster go for large amounts, it is far more common to find that items are priced either at or near market value, or are bid up to that point.
When framing memorabilia, it is also considered best to use a shop or framer who guarantees a complete "archival" process from start to finish. Archival methods are designed with an eye towards preserving the piece. This generally includes UV-blocking conservation glass to prevent fading and acid-free and lignin-free mats and backing.
There are several kinds of conservation glass, ranging from the slightly-fuzzy "non-glare" to the clear and reflection-resistant "museum" type. These different types of glass vary greatly in price both from each other and from region to region, but modern conservation glasses all offer equal UV protection, and thus which glass one chooses to use is more a matter of taste and budget than anything else. While oil paintings, acrylic paintings, many statues and figures, and certain mixed media pieces can be framed without glass, it is advisable to frame any cloth or paper piece (including photos, posters, maps, etc.) under glass. Additionally, it is very important to prevent the glass from touching the piece, as any moisture that gathers on the inside of the glass could easily be transferred to the memorabilia, and cause mold, mildew or water damage (for instance, brown spots known as "foxing" can appear on water-damaged paper); however, glass is easily kept away from a piece by the use of plastic spacers or by paper mats, the latter of which can even be used to hold the piece in place without the use of glue or tape on the piece itself.
It is not generally recommended that pieces be glued or taped down (though cloth pieces can usually be sewn down safely), as many commercially available glues are not acid-free and can be difficult to remove later; masking tape, for instance, often leaves yellow-brown marks over time on paper pieces and is also somewhat difficult to remove. In addition to the problems of acidity or removal, improperly-spread glue can cause rippling or buckling in paper. It is generally more advisable to hold a piece in place with mats (which can be hinged to the backing so that they rest on, rather than stick on, the piece), mylar photo corners, acid-free thread or clear plastic cords than it is to glue or tape it to the backing.