Miller Pro Model Ryder Cup Kiawah Island golf bag

Greetings,

Around 1999 I picked up a leather golf bag in the Austin Texas area when I stopped at an upscale home having a garage sale.  It is White with red and blue trim (all leather) and has "United States" embroidered in blue, with "Ryder Cup" and logo featuring "Kiawah Island" on the logo. 

I have been researching for several days and I have found only a small amount of information on this bag.  Apparently the 1991 Ryder Cup was last held on Kiawah Island in 1991 and is somewhat famously known as the "war by the shore".  After watching some footage off the event online, I discovered this bag appears to be the same type used by the USA team.  The only visible difference was no golfer's name embroidered on the bag with the flag and logo.

I have found a similar bag for sell for $499.00 which was from a later Ryder Cup and it was not all leather, though similar in pattern style.  The nylon-padded type material was the major covering and looked a bit tacky as that material seems to get over time. 

At any rate, I have found very little information on the bag itself, though it's cousins seem to be well regarded from other years. 

Any ideas on the value off this bag?  It is in excellent shape, but does have several small smudge-type rub marks no doubt obtained during everday golf use. They may be able to be removed or lessened with some type off leather treament or cleaner. 

I am considering selling it.