Actually my current holy grail is a Philadelphia Fox XE 20 gauge with 28" or 30" barrels, double triggers, straight grip, and original finishes and original butt.
Now if I was at a gun show and found two identical Fox XE 20s, both at the same price, that met the criteria except that one had had the chambers lengthened and the chokes opened and one hadn't I would buy the one with the original chokes and chambers.
If the one with altered chambers was all that was available I wouldn't buy it unless I thought it was underpriced. I then would use it for trading up to the one I want or to make a little pocket money when I sold it.
In support of Chuck's position I don't think the market discounts extended chambers much, assuming a good craftsman did a correct job of extending them and adequate chamber wall thickness. But it doesn't mean I won't.
