Plum District is offering Gilroy Gardens tickets today for $22 (normally $45). You can buy as many as you want. The tickets expire September 29, 2011. The tickets are on the San Jose and East Bay pages. Gilroy Gardens is a fun place -we've been several times.
If you miss the deal, there are discount coupons for Gilroy Gardens ($15/off a ticket) at SFBayFun.com.