Good day sir, may i know where your shop is located?

Do you have these models?
1.SAM-PS43D451
2.SAM-PS43D491

Are these brand new units?
Does your unit come with standard manufacturer's warranty?
What is the payment method? Cash or credit?
If payment via cash, is there any additional discount?
If payment via credit, is there extra charges?
If any problem arise, do you provide any support? ie technical support

Thanks. Hope to hear from you.