Just grab this off the net: Halfords Trade Card. These can get you anything between 0% and 80% discount on Car Parts in any Halfords store. The problem is that you don't know how much discount it gets you until you take your card and the item to the till and ask them to scan it through. Rather than doing this every time, I thought it would be a good idea to try and start a list of rough prices for various items that people have purchased. This should give us a fair idea of if its worth getting the item from Halfords or your local motor factor. Any other relevent information may be useful as well - for example the discount on Halfords own brand products is generally greater than that of a 3rd party. Official MoneySavingExpert.com Insert: If you're a mechanic or in the trade and can prove it then the Halfords Trade Card could mean sizeable savings. To prove you're eligible you'll need to show either your City and Guilds in Motor Mechanics certificate, or equivalent, or proof that you're employed as a technician. However, even if you've been working in the trade for some time and can't prove you're qualified, some store managers will, at their discretion, give cards to those who can prove they make a lot of purchases by showing receipts from local motor factors although they'll also prefer that this be accompanied with proof of employment where possible. I might attack this from another angle after reading this, I've got tech certs for my work. I'm always buying tools and bits