I have rented the 'Gold In The Net" series and cannot recommend them as a purchase, they are simply too outdated. You will pick up some good pointers, but overall the are not worth the money, IMO.
Last year I purchased the Hockey Canada dvd's for goaltending and I really liked them. They are beginning to show their age (eg. older style goalie pads) but the message is very sound. The series was written by Andy Moog and Ian Clarke, both well known NHL goalie coaches so the material is very credible.
If you are looking for a "system of goaltending" the 2 DVD's (Fundamentals and Advanced) are the best I have watched to date. They require a bit of cerebral analysis but if you understand and implement them you will see a definite gain in your game. They can be purchased at
Hockey Canada
Keeks' DVD's are a good resource too, as noted earlier.
You will not go wrong with either purchase.
Wellsie