The blacksmith really gets worse as you level up, since your equipment will constantly be more and more tailored to your character, while the blacksmith's will still be totally random. If you have a piece of armor with one property you find useful, it might still be worth it to smith one with 3 random properties, but when you have armor with 2 properties you want, making one with 4 random starts being pretty pointless, especially with the extremely high prices. Hopefully the price lowering will make him interesting again.
The jeweler sort of seems useful, but you should remember that the equipment drops always have higher stats bonuses than the gems at a particular level, so unless you only want to buff one stat (granted, many characters will), you're better of without sockets. Weapon and Helm slots seem to be always useful, though.