$251 is the coronary inducing price for a top ticket to “Cavalia” the equine spectacular now playing near the ball park in SF. But Goldstar, the discount site has tickets starting at $78. The 9th Annual David Sedaris show at the Eureka Theater (sorry, no Sedaris) go from only $12.50. Discounts are cut even deeper for “The Texas Chainsaw Yuletide”, also at the Eureka. Just $7.50.