Value of Bucky Walters single signed baseball?

[GDoggy]

Trying to get a value for my 1940 Reds single signed baseball collection, but unsure of a value for the Bucky Walters ball.

Balls include:
Bucky Walters - Died: April, 1991. Cert: James Spence E86106 on Bobby Brown Ball
Jim "Milkman" Turner - Died: Nov, 1998. Cert: James Spence D02489 on Bobby Brown Ball
Johnny Vander Meer - Died: Oct, 1997. Cert: James Spence D02493 on Coleman Ball
Eddie Joost - Died: April, 2011 on Budig Ball
Bill Baker - Died: April, 2006 on Coleman Ball

I know the bottom three do not go for much. Looking at recently sold listings on ebay for Eddie Joost, $50 to $75 looks to be the range. Bill Baker about the same. There is a listing for a simular one for $80. Johnny Vander Meer, certified, double date, $75 to $100. Jim Turner, certified, go $100 to $125.

I have had the Walters' ball for 7 or 8 years now and have watched for years. I have seen only a couple. There is one, but not really comparable, that is listed on ebay for $2,000 (which is why I have decided to post this). One that is very comparable, went in 2014 for $1,100: http://dec14.hugginsandscott.com/cgi...l?itemid=79612. I remember seeing one on a website about 5 or 6 years ago that wanted $800, but not sure which.

So my guess on the value of the five together would be somewhere around $1,400 to $1,600. Does that seem like a fair value?