Flussonic Offline (any version up to 20.10):
250 Eur/server
2000 Eur/unlimited
Ministra/Stalker Portal(any version patched):
License key verification removed can be used with ministra app without key (test available upon request)
500 Eur/server
1000 Eur/unlimited
Cesbo Astra:
250 Eur/unlimited...