It's really difficult to say because it's impossible to determine anything about the quality from that photo. I suggest trying to determine the overall quality and then researching similar pieces.
For resale value the best way is to check ended eBay listings for similar items. Make sure to check for the ones that actually sold. On this I often hear akoya necklaces being sold for a couple of hundred dollars so even for a good quality akoya bracelet (and your guess is as good as mine with only those shots to go by ) probably would not bring in that much if you wanted to resell it.