Or get a Halfords trade card! I get more discount than the people who work there! Up to 50% on some stuff. Oil is 30%ish tools are 25-50% depending on the individual costs.
I sorted my garage into 4 piles of stuff.
1. Stuff I`m keeping
2. Stuff I`m not getting rid of.
3. Stuff I might use..one day.
4. Stuff that might come in handy.