While financial decisions are highly personal... IMO, $325 for 4 days of seminars and networking is a good investment, especially since your child is young and you can leverage the information you receive there, for many years going forward while raising your giftie.
The event program brochure may often read like who's-who in gifted services, and may be worth keeping as a go-to directory for several years.
Hearing the presenters in person may give instant insight, as your gut may tell you which areas to pursue for further information about your unique child.
You may wish to begin with attending a "gifted 101" type of seminar (often led by Carolyn K of "Hoagies Gifted Education Page") as this is a good place to meet other parents who are starting out. Here you may find your "tribe" in other parents to bond with and keep in touch over the years.
