Hi I tried KC Brains 'Mango' on my first grow last year. 2 popped, one of them tried to grow upside down and the last looked lovely untill she hermied just into flower
Likewise I tried Nirvana and found theyir germination rates good. They were easy to grow and survived my newby errors
That said, there's loads of cheapish strains. The 'Skunk' from several firms is inexpensive and I'm told hardy. Also peeps here often speak highly of Mandala seeds
peace
Arbuscule