The condition your car is in will have a large influence on its value. Assuming your car is in good condition this means it will have:
Minor or cosmetic damage to bodywork, wheels, tyres and interior
Minor or cosmetic damage to lights, glass and mirrors
All tyres are safe and legal
Documentation and keys present
Partial, documented service history
Current MOT
No outstanding finance
It is not a write-off (category C, D, S or N vehicle)