Order Early - This is not a marketing gimmick. Early orders generally get the pick of the crop. Your chances are better of getting exactly what you order with no surprises. Catalogs are generally sent in spring and early summer.
Terms vary widely.
Will they replace or refund in case of problems. Compare Prices - Prices are not the same. Our opinion is that you do get what you pay for. Cheap bulbs are generally cheap for a reason. Smaller bulbs generally give smaller and fewer flowers.