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I'm interested in purchasing some of your cacti, specifically Pachycereus Pringlei. Could you let me know the available sizes you offer? I'm also curious about your pricing for these products. It would be helpful if you could provide information on bulk discounts or any pricing tiers. Additionally, please include details about the shipping process to Bulgaria. What are the delivery times I should expect, and do you provide any tracking information for shipments? I'm looking forward to your response so we can move forward with this potential order.