The cheapest graphics card you can play it on is an NVIDIA GeForce 6100. To play Steam Store Simulator you will need a minimum CPU equivalent to an Intel Pentium 4 2.00GHz. Steam Store Simulator system requirements state that you will need at least 1 GB of RAM. You will need at least 300 MB of free disk space to install Steam Store Simulator.
Steam Store Simulator will run on PC system with Windows 64-bit and upwards.
Minimum System Requirements
CPU
Intel Core Duo Processor (2GHz or better)
RAM
2 GB RAM
OS
MacOS X 10.11 (El Capitan) or later
Graphics Card
ATI Radeon HD 2400 or better / NVidia 8600M or better