See my comment about Resilio sync above

Resilio sync works great for that since syncthing is on the out. I actually prefer Resilio anyways

I know I’m in a different situation here but i buy all my server drives off ebay. Just got ~60TB worth of SAS drives for a little over $200 USD. Ive never had an issue. Most of these places are where business sell their drives to be wiped. Then they just put them up on ebay

Edit: bad autocorrect