Carolyn is responsible for leading many of us forum members deeper into pearl addiction, lol! You can contact her through the ebay system and ask if she has more pearls similar and how much they would cost. Give her your direct email. There was just the big gem show in Tucson, so she may have lots of stock.
There just isn't any perfect anything-you-want-always available source. Wish there was!! I have purchased unfinished graded strands from Pearl Paradise and The Pearl Outlet. It's great to have their excellent quality pearls, that don't have to be picked over and rearranged and sorted, like I must do with the cheaper strands from other sources. It's a real time saver to have quality pearls!
The "Gem Faire" that puts on shows 3-4 times a year on the west coast has 2 hours Friday morning for wholesale only (credentials required) but then is open to the public. Some vendors prices are the same for all, others discount for large purchases. I'd say it can vary quite a bit, and usually you can politely negotiate.
Intergem, or International Gem and Jewelry Show may also come to your city. Good luck!
Prices, quality and availability vary from show to show, vendor to vendor.