Planing to buy this pc

Jun 22, 2018
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Is this a good pc?
I5-7400
8gm ram
Gtx1050 ti 4gb
1tb hdd
Cost 400 €
But it is used
Or should i buy a new pc wich is
Pentium g5400
8gm
Gtx1050 ti 4gb
1tb hdd. Wich?