MMA
Mixed Martial Arts is a sporting event that is so new, that the term “vintage” cannot really be applied to it yet. However, because it is growing in popularity, it has excellent speculative value, and any investment in items may experience increases in that value over time. For those interested in collecting in this field, stick with those items associated with those who have achieved milestones and set records, have them autographed, and preserve them to keep them from deteriorating.