I like marijuana-seeds.nl. Their "value packs" and 2-for-1 sales can give you *a lot* of seeds for low $. If you can catch their 4/20 and Black Friday sales, it's really inexpensive.
Their stealth is very good. I had to look twice before I found the payload. They respond to questions/complaints within 24 hours, and they were very responsive when handling a problem I had (a payment problem, nothing to do with anything I received.).
Only downsides are:
1. They don't provide a tracking number. I think that might be part of their stealth strategy. (The best secret is one you don't have.). If you don't receive the package, you contact them and they track it.
2. They don't publish the breeder. When I first bought from them I was more into price than quality, so was willing to try it. Accomplished growers might not be willing to try it. But, after growing many plants from their seeds, I don't intend to use a different seedbank. The potency and consistency has been fine for me.