Please consult an local expert or the salesman for your region on this topic.
Choosing suitable varieties relays on many aspects and you will need advice based on your location.
There are many aspects to consider such as sales and market, climate and ground, irrigation,fertilizers and pesticides, workforce, labour costs, facilities for storage, packing, sorting, growing seedlings, etc, etc, etc. Just goodlooking varieties or the cultivar with the cheapest seeds available might not be suitable for you.
I seriously doubt you will find suitable advice or competitive pricing in Germany.