First of all, the website looks simple, and that is ok. What i would suggest you do is, put frames around the images so that the overall look will be better. Secondly, change the current logo. Current colors doesn't match with the rest of the content/design, so it would be better if you would make logo for example in a silver color, a little bigger and 1px shadow on it ... Try that and it will look much better. Also go search on google and find similar sites and see if you can do anything to improve your own site better... Maybe some extra functionalities, categories would also be nice.. etc.

Good day