I have a brand new and completely unused set of 7 flow frames complete with flow key, manual and bee veil for sale on ebay for $445 plus $29.99 shipping. Everything will ship in the original box. If you're interested you can look at the ebay listing at the address below:
https://www.ebay.com/itm/FLOW-FRAMES-7-pcs-Honey-Tube-for-Flow-Hive/282903336836?hash=item41de5a5784:g:j54AAOSwU95au8pl
If you do need more information don't hesitate to contact me here on permies:)