I want to upgrade from my 8 speed Campaq Chorus groupset to a 9 speed groupset. Looked at prices on the internet and thought of ordering it from there. Now my question is, is it really cheaper to order over the internet as opposed to buying it from a cycle shop in South Africa? Never done something like this and is it safe? Which is a reputable site that I can use? BTW, I live in Pretoria, (SA).