i own a couple of the cheap random brands like this
i think my last unmanaged 6 RJ45 port one with 2.5gb poe and 2 SFP+ 10G ports cot $90 (USD) in sept.
They are great value for money, so are the managed ones. I used it for a dedicates network for a ceph cluster (its sort of hidden in this shot on the rack shelf to the left of the ubiquiti POE switch https://gist.github.com/scyto/76e94832927a89d977ea989da157e9dc