Thank you very much for your replies.
So far, I have not been able to find out the spec for the power supply.
Although it is slightly above my budget, I have found an Acer Intel i5 desktop PC
ACER AGX-781 018 8GB - 1TB
Processor Intel Core i5-7400
Processor cores: 4
Processor speed: up to 3.50 GHz
RAM memory: 8GB DDR4
Graphics card: NVIDIA GeForce GTX 1050 2GB GDDR5
Type of graphics card: Dedicated
Ready for virtual reality (VR Ready)
Storage capacity: 1TB
Operating system: Windows 10 Home
System architecture: 64-bit
The power supply is sufficient for the graphics card and the shop has had one on display running games for several weeks.
Is the spec sufficient to run SL?
Many thanks again