i recently made my first online bike purchases. I live in South Africa, and had family travelling in the US, so took the opportunity to buy some things cheaply. I had the stuff delivered to another family member in the US, so I only had to pay local postage rates.
I used JensonUSA (
www.jensonusa) to buy a helmet, two chains, and a cassette. I was very impressed by the service and the prices they offered. Any email queries (and I had a lot) were answered very quickly, and dealt with the issues. They also offer a great price match facility which I had the opportunity to see working. Would definitely recommend them to anyone looking to make online purchases.
Also tried to buy a HRM from supergo (
www.supergo.com) but they struggled to verify my bank details so the transaction couldn't take place. However, the level of service from supergo wasn't as good as jensonusa. My emails were ignored on a few occasions, and I almost missed the opportunity to buy the HRM as they took a while to get back to me regarding the bank details.
In the end I bought the HRM from an amazon.com associated company. Think it was called bikesomewhere.com. Good price, but two-day delivery evened it out.
My experience with buying online was overall very good. It allowed me to take advantage of paying US prices and avoiding the costs of international postage. To give you and idea of the cost saving of just one item, I bought a Giro Pneumo helmet for $109, and in South Africa it would have cost the equivalent of over $300. I had similar savings on all items.