Laptop for gaming and good portability

Hello, I know my budget is low for what I want but I'll try to buy refurbished or used ones to aim a bit higher. What do you think of a used Dell Inspiron 17R SE for 520 euros?

Before we start.

Must have:
Good to excellent battery life
Enough power to run all the games in the market, obviously not with high graphics but avoid intel HD and ****.
Good quality of materials
No overheating shut downs


General Questions

1) What is your budget?...

Laptop for gaming and good portability

Laptop for gaming and good portability