Well, you could repair the wood for a reasonable amount, but sleeving the barrels is a $3-4K job plus the price of having new ribs made and fitted, and when you're done, you have a sleeved Lindner Diamond Quality Daly, which probably doesn't have half the value of what you've put into it. I wouldn't pay more than about $1500 for it, and then only if I really wanted to restore it to some of its past glory and didn't mind losing money on the deal.

That it's a 10 gauge wouldn't bother me (I own a Hollis hammer gun and a Darne in that gauge), and it could be a wonderful waterfowl gun with sleeved barrels, which would also let you use modern shot.