Hi Mike, If the Silver Strikes are dated 1997 on the logo side there were five strikes in the set, (Baseball, Basketball, Hockey, Football and a Riverboat). The strike machines were there for over a year, (as the one at Station Casino Kansas City was), and there are a good number of strikes out there. I sold several duplicates on eBay and was getting right around $25 each. You do not see them that often on eBay but they are not that rare. Hope this helps. Mike