The Scotty is a collectors item, the SC 009 is a Tour only putter that were/was made for pro's. As @iacas stated, it's a matter of what someone is willing to pay for it, especially with you're talking about collectors.
In terms of physical differences, the 009 is a milled putter I have no idea how the Knight is made. Many pro's have and continue to use the 009, I've yet to see any pro game a Knight. Beyond that, if you look at the details there are a number of physical differences between the two.
There might be other styles of Scotty putters selling for less than the 009 model, but I looked and couldn't find a Scotty Cameron 009 putter that wasn't priced in the thousands of dollars.
Absolutely agree, yet the most I would ever pay for any putter would be $10, but that's just the way I am, and currently my putting game is clicking and therefore I have no need to think about some other putter, especially one of those gimmicky, gawdy ones with those long prongs sticking out the back of it.
Mets blew the weekend trying to exact revenge on Chase Utley. They had to know any pitches close to Utley were going to be seen as retaliation and result in ejection. You want to throw at a guy do it when a scrub is pitching, not your number 1 or at least wait until he's about to get pulled for a relief pitcher, not in the 3rd inning. Utley got the last laugh hitting two home runs that game, including a grand slam.
It's frustrating to be a Mets fan and watch them make the same stupid mistakes year after year.