See a used Scotty that you like?  They're not only the finest putters made, they are also collectible.  But BE CAREFUL to make sure it is an authentic restoration.  The ONLY authentic restorations are done in the Scotty Cameron Custom Shop.  They have a a restoration and authentication service.  The restoration usually will cost $100 or more, and authentication is another $30 - $45 on top of that. The restoration includes: reshaft, regrip, shaft band and standard headcover.  In addition, the authentication service will grade your putter in one of five categories: A- 100% Authentic, B- Slight Alteration, C- Significant Modification, D- Trademark Infringement, and E- Counterfeit.  Only Grades A & B will receive a Certificate of Authenticity.  In addition, the putter is registered and the number can be traced on their website.  Red Flags are:  Missing or old headcover; non Cameron grip, missing or damaged shaft label, or a non factory finish (Copper is a good example), etc.  If the putter was factory restored, all of these items would be present and in new condition.  If that's not the case then the putter was likely altered.  It may still be a fine putter, but it is not a collectible, and it is worth no where near what an authentic restoration is worth.  Scotty Cameron putters are expensive; just make sure your hard earned money is buying the "real thing".  Ask the seller to provide the registration number, COA, work order, or other proof that the Cameron custom shop did the restoration.  If they can't produce it, beware.  Check out the scottycameron website. I'm just a Scotty Cameron fan.  Thx for listening.