I got this as a drop in EotN the other day. I'm thinking of putting a +30 Hp handle on it, and also a damage -5 chance 20% inscription. How much would this shield be worth with and without those mods?
Like he said, don't bother modding it, people are looking for the 8, the attribute required, and the skin far more than the mods. They'll do it how they see fit. The mods you're talking about are best used either for yourself or to sell separate for some decent cash.
1) modding to sell is not worth spending your cash on mods that someone else may or may not want
2) -5/20% is not that great if you plan your build/shield accordingly for what you're going to face