I use Laynelabs, they don't have a minimum requirement, and have all mouse sizes from 1-day old up. The only downfall for me is that they ship from somewhere in California I believe, so shipping for me is around 40 bucks, but I back ordered enough for my only current snake, and the one I plan on getting sometime next year, to last a while. For my baby I got 50 1 day olds and 50 large pinks (enough to do easily for several months, 8+ I'd say) for only around 80 bucks. And I read (although this is my first snake) that when it gets full grown the cost of that will go down a bit. I live in the middle of no where, 150 miles+ from the nearest reptile expo, and I've looked everywhere online for mice breeders/fellow snake owners that are close and have found nothing [emoji30] so I'm forced to buy online. BTW everyone who reads this, I'm in the WV, KY, OH tristate area..... If anyone is close lol