It's not totally new so keep that in mind. Looking at what is in there does it seem a decent price comparing to what parts costed new. I say compared to prices new cause for instance the cpu can be bought for well under $100 now.
What i wonder about is the psu,
a 500watt can be good or utterly trash.The ram is "only" 1333mhz so not the fastest as well,but should do fine,must say it is ecc as well (server ram) what might (not necessarily) make it again even a little slower as well. It's at least more than enough.
Don't think anyone can make a similar build for that price with a quadcore/hyperthreading cpu+gtx 1060+16gb ram+windows in it.
A probably similar performing pc in the UK,
PCPartPicker part list /
Price...