Re-stocking, if improperly done, is very detrimental to the value of the gun in the eyes of someone who can spot it.
I have often found myself advising a client that a gun has been re-stocked and the stocker got something wrong regarding the stock shape, forend profile, wrist shape, comb shape, chequering border or style.
If a new stock has been done absolutely correctly, forend too, it will not adversely affect the value of the gun.
+1..... I totally agree Dig.........
So many owners now days pick their own wood rather than instructing an experienced stocker to choose grain and feather for originality....The results are disasterous grade for grade......
In some cases they even change the 'type' of wood and of course the checkering pattern, comb style and on and on......
The gun ends up looking like a Ferrari with a metal flake paint job IMO.....