PC on these mods

sheild mod: +22 health
offhand mod: +53 health (while hexed)
weapon mod: +42 health (while enchanted)
hammer grip: +25 health
inscriptions: recived physical damage -5 (18%)

There is a forum listing prices on most mods. The reason these mods were not on there is because mods need to be max or near max to be worth anything(why spend money on something that isn't the best?). It is possible to sell mods that are 1 or 2 off(such as +29 health) but the price will be greatly reduced.

From what I can tell(and I'm no expert) none of these mods are very close to being max, so the merchant will probably give the best price.

But that's just my two cents

Merch them all.