Many OGS branches now offer their cemetery transcripts on CD-ROM, for smaller cemeteries you can purchase a CD for usually $20 or less and get several transcripts (sometimes an entire township!). Because this medium allows a considerable amount of information in a tiny package many previously unavailable transcripts (too large for print!) are now available for purchase on CD.
Also keep in mind that transcripts can be a lasting record for older headstones that have deteriorated. If you know an ancestor was buried in a cemetery but cannot locate the headstone consult the transcript to learn if a stone was present at the time of first transcription (for some OGS branches this would be the mid-1970’s).