I do have some dubia right now.
However, I'm like Brad. I sell 50 medium to large nymphs/adults for $25 plus shipping. If you truly want mixed population, or only smaller nymphs to immediately feed, it might be a it would be less.
If you don't have to pay shipping this usualy saves you between $6-$9 in itself.
Sounds like you'll get a good deal.
Matthew