I have been using a Ping Anser putter for over 30 years. Yesterday I searched on Google for the value of the putter and got a whack of hits from Yahoo to Pongman. The label inside the head reads;

Ping Golf Clubs
PO Box 1345 Scottsdale Ariz
Made in USA
Other Pat. Pend

The collectors value ranged from $1500 to $4000 (US$) but the websites seeem to be fairly dated ie; 2008. Needless to say it peaked my curiosity!!!

Does this make sense and which is the best website to garner more information and have the value of the putter properly authenticated?