According to Kovels Antiques and Collectibles, a Slowpoke Rodriguez glass from 1973 was worth $50 in 2001.  It would be worth even more today.  You can get a free login and check it out yourself like I did. (www.kovels.com). They are going for WAY less on ebay!  Dont miss your chance to bid on a 1973 Slowpoke Rodriguez Pepsi glass now!