@Old Sage Seeds Hey I'm no expert but looks clean and easy to navigate to me. I plan to order soon and will give you any impressions about the order/checkout UE.
Edit: Here's one. I like the right menu with all the breeders in product categories. Make the numbers a little bigger so you can more easily see what's in stock on the breeder level. Maybe it's the grey font instead of black. Make sense? HTH, IMHO, YMMV, etc.