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I'm looking to source call centers and headsets for resale purposes. I'd appreciate it if you could send me your current pricing for these products, including any bulk purchase discounts you may offer. Additionally, please provide details regarding the specifications available, as I'm interested in various options that could cater to different client needs. Also, I'd like to know about the shipping methods you use. It's important for me to understand the time frames for delivery as well as the costs associated with shipping to my location. If you have any recommendations for reliable shipping options, please include that information as well. Looking forward to your prompt response!