意大利采购需求：益生菌、α-GPC、NMN、TUDCA、5a-羟基拉肖皂苷、刺槐豆胶

I'm reaching out to inquire about a potential order for 2,000 units of probiotic capsules, each containing 60 counts. I'm looking for a comprehensive quote that includes the unit price, any potential discounts for bulk purchases, and the total cost including shipping to Houston, Texas. Additionally, please provide details on the estimated delivery timeframe and payment terms. If there are any available certifications or quality assurances for the product, that information would also be helpful. Looking forward to your prompt response so we can proceed quickly!