I agree with onzabob, i try to buy things from bikeshops, but sometimes i have been messed around by shops, (watin 3 months for a booster), but as a rule i will buy stuff from shops (i.e. parts that i'm not sure on how to use, put in/onto my bike) but with something like a booster that is prety simple to put on and is 5 quid less then i will go online for it. although i agree somepeople to realy f**k you on postage!