The unit usually goes for $330, i have two of them new in box. They are the only drop-in filter sock option for 7” sock holders. Work well (i am using some now), just bought for a future use that didn’t happen. If you buy both ill throw in the cable that allows master/slave function for free...
I have (2) Klir DI-7 V2 filter rollers with the Y connector for sale for $200 OBO a piece. Only used for 2 weeks. Pick up is in Sidman Pennsylvania. Let me know if you’re interested!