but all the part is new, actually he mine about 3 weeks
He is not selling used parts...he is selling used parts. Once the package is opened, it becomes used. You cannot take a graphics card, use it for 3 weeks or even 1 day, then claim it is new and sell it on ebay or amazon or here as "new". The fact of the matter is, this is used equipment, and the price is wayyyyy over new anyway.
Here is the 580's as an example
https://www.newegg.com/Product/Product.aspx?Item=N82E16814137119&nm_mc=KNC-GoogleKWLess&cm_mmc=KNC-GoogleKWLess-_-DSA-_-CategoryPages-_-NA&gclid=Cj0KCQjwruPNBRCKARIsAEYNXIgRVHafXDNzwbhfYNu-s41QJ9KcACbxr_QchV1JHMmpO_sV-h3EOYgaAuYoEALw_wcB&gclsrc=aw.ds
7 of those would be $2100, and you can complete the rest of the rig for around $400-$500, and that is new price. The asking price is about $1200 over that.
yes i clearly understand, when i tell is new i wanna tell is not parts used in mining for 1 years, but clearly when the box is opened is not new