Good question. Usually custom builds will bring in half of that they cost to build. But for the most part reshaping the stock and new checkering doesnt add to the value. I would guess if you removed the scope $1,500 - 1,700 would be fair.
But the best way to sell a rifle such as yours is to take plenty of nice photos and list it on gunbrokers for 10-14 days. Add a reserve if you like. You may get lucky and have some competing bidders.
