This bola sold on eBay in 2010 for $150. The listing had the following description:
Pre-Columbian, bola balls, Tiahuanaco. Pre-Columbian, a pair of bola balls, Tiahuanaco culture, 2500 BC - 1000 AD, Bolivia, Black round stones, with rawhide and twine covering and remnants of the original cords. 1.8 in. in diameter. Excellent condition.