I think you're dead-on. Reviewing the other photography sites, I was struck by how few photos most of them displayed.
That's more because the other photographers are using their website as online promotional tools than stores. If you are selling things put it all out there. I'd say you've along way to go before you can quite the day job... there's a shitload of photosites out there for critique advice, hit'em up. Your photos aren't good.