Probably not much, I haven't looked at the actual price on the AH. But armor is low, block chance is good, resists are low, stats are ok (but for the one class that usually doesn't use shield, though they might to keep the death repair costs down), the thing it has going for it is the Attack Speed, and since i don't think any other shield has that, it's hard to judge, that could make it worth a lot as it might actually be a worthy shield DPS wise even compared to a Source item. But based on the other stats I wouldn't say much, so it's really a question of how much that AS is worth. Your also talking about wading through Act 3 without much of a problem. which means you most likely will have no problem finishing the game in the gear you got. So that shouldn't be a huge issue, items will appear you can use, just won't be as common.