While shopping for my Dad for Father's Day, I came across a "widow's mite" on Amazon. I found it very interesting that the coin in a case with a few words added was $50. Other Roman era coins are available for about $1 each. The coin was originally worth less than a penny from what I understand. I think that it's amazing that not only did Jesus say that her offering was worth more than monetarily greater donations because of the sacrifice that it took for her to give it, but her simple act of giving exponentially increased the value of the thing she offered as well.

Sure, you can look at this with a cynical eye and say that just proves how gullible Christians are. But, I think that misses the point of why the coin is so much more valuable than others of the era. A strictly capitalist view of it still proves one lady's act can increase value and demand for what was once thought of as almost worthless.
http://www.amazon.com/Widows-Mite-Ancient-Deluxe-Portfolio/dp/B00HUJPV62/ref=sr_1_6?s=collectibles&ie=UTF8&qid=1400643994&sr=1-6&keywords=ancient+coins