Commemorative guns are usually poor investments and value will probably increase less than it's plain jane counterpart. I suppose because fewer people are interested in collecting the commemorative guns. For those that do collect them, firing one is considered the kiss of death for resale value. It boils down to your own preference as to how badly you want to pay the extra for a fancy shooter.
The one I was speaking on was a WWI Commemorative. Asking price was 899. Inexpensive compared to unmarked pistols of the same series. Thought it might be a good shooter for the price. Especially since the comm's don't really appreciate.
Commemoratives don't speak to me at all. I generally don't care for the "decorative effect". I won't own a firearm that I'm not willing to shoot. If I found a commemorative variation of a solid dependable model that appeared in the regular line, and the commemorative was less, I'd buy it and shoot it. Probably would attempt to "de-comemmorate" it's appearance as much as possible.
Years ago a friend pointed out to me that you could pick up many of the commeratives for less than the regular guns. The values on most are fairly stagnant and I would shoot one if I was looking for a shooter. Go for it and shoot it!