Nirvana only sells nirvana seeds. You're missing out on tons of other breeders. IMO nirvana is not that good, based on past experience. He's looking for a seed bank, nirvana is a breeder that happens to sell their own seeds.
Barneys Farm
G13 Labs
Dinafem
Holy Smoke
DNA Genetics
Greenhouse
Reserva Privada
Dutch Passion
Bomb Seeds
All of the above listed are Breeders who sell their seeds through Attitude/Herbies. Most of which have better strains and more stable fem seeds than Nirvana.
Nirvana is a breeder/seed bank
herbies is a seed bank
atttiude is a seed bank
IMO, Nirvana has a way of appealing to beginners because their seeds are relatively cheap and use popular names like White Widow, AK48, Aurora Indica, Northern Light, Jock Horror ect ect...
I've bought from herbies for years, Every order I've received took less than 10 days from order date to arrive. They don't charge an arm and a leg to ship discreet like Attitude does. In fact it is no extra charge. All you pay for is shipping and the seeds. So now you can say you've heard something good about Herbies. IMO the best seed bank you can buy from.