Yes, discounts will available if you buy two or more from our store; please feel free to contact us for discount price.
Items in this listing comes with 30-days money back warranty and one year manufacturer repair warranty.
The default shipping company is speedpak or similar carrier with tracking; normally, items will arrive in about 2 to 4 weeks.
In some rare cases, we would automatically upgrade the shipping service to express(DHL, FEDEX, UPS, EMS etc.,) without additional charges. If you need quote of the express service for your country, please contact me.