In what venue? At a show, perhaps that much. But if you are planning to sell them on eBay, first do a search for what similar rings sold for recently. EBay is flooded with inexpensive jewelry and much of the difficulty is getting anyone to even look at your listings. And if other sellers'...
1. Colors are wrong for Tahitians
2. too small for Tahitians
3. glossy sort of finish-- not pearl-looking
4. Not dyed freshwaters either, too long ago for that shape
5. Not typical color for dyed akoyas
It sounds to me like the owner consigned them with a local jeweler, who may or may not succeed in selling them at that price. If the seller tehn drops the price the OP may be able to get them to get them for less.
Did I get that right?
The necklace appears to be to be a very pretty strand of akoya pearls, well matched and lustrous. It's hard to say from the photos if the earrings are also akoya as many ladies buy imitation pearl earrings, but if there is a metal mark indicating they are karat gold then they are likely akoyas...