These good mother board for the prices an in general ?

[waholi]

GIGABYTE Z170MX Gaming 5 Motherboard & Intel Core i7 6700K Unlocked Processor $634.99

GIGABYTE Z170X UD3 Ultra Motherboard & Intel Core i5 6600K Unlocked Processor $504.99

 

[Zerk2012]

Depends on where you live I guess in the US no.
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-6700K 4.0GHz Quad-Core Processor ($308.98 @ Amazon)
Motherboard: Gigabyte GA-Z170MX-Gaming 5 Micro ATX LGA1151 Motherboard ($131.99 @ NCIX US)
Total: $440.97
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-03-24 18:14 EDT-0400

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-6600K 3.5GHz Quad-Core Processor ($219.99 @ Amazon)
Motherboard: Gigabyte GA-Z170X-UD3 ATX LGA1151 Motherboard ($125.64 @ Amazon)
Total: $345.63
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-03-24 18:16 EDT-0400

 

[waholi]

Depends on where you live I guess in the US no.
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-6700K 4.0GHz Quad-Core Processor ($308.98 @ Amazon)
Motherboard: Gigabyte GA-Z170MX-Gaming 5 Micro ATX LGA1151 Motherboard ($131.99 @ NCIX US)
Total: $440.97
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-03-24 18:14 EDT-0400

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-6600K 3.5GHz Quad-Core Processor ($219.99 @ Amazon)
Motherboard: Gigabyte GA-Z170X-UD3 ATX LGA1151 Motherboard ($125.64 @ Amazon)
Total: $345.63
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-03-24 18:16 EDT-0400

I live in Canada

 

[Zerk2012]

Canada prices.
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-6700K 4.0GHz Quad-Core Processor ($404.99 @ Amazon Canada)
Motherboard: Gigabyte GA-Z170MX-Gaming 5 Micro ATX LGA1151 Motherboard ($165.98 @ NCIX)
Total: $570.97
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-03-25 08:13 EDT-0400

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-6600K 3.5GHz Quad-Core Processor ($244.99 @ Newegg Canada)
Motherboard: Gigabyte GA-Z170X-UD3 ATX LGA1151 Motherboard ($180.50 @ Vuugo)
Total: $425.49
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-03-25 08:14 EDT-0400