Buying a used embroidery machine can be a gamble unless you are [or know someone who is] well experienced with the operation and servicing of these machines.
If you are new to embroidery, I would suggest you not purchase any used machine unless it has been thoroughly gone over by a well qualified tech first.
As far as the Inbro brand machines, I think you will find that some owners have been happy, some have not. Inbro's single head 12 needle machine has probably been their most reliable embroidery machine.
Inbro service and after sales support has not been as good as it should be ..... do a search for Inbro machines in this forum for more info. There is also an Inbro group at
inbrousa : Inbrousa
that you may wish to check out.
Not sure where you are located but it is also important for you to know how close the Inbro dealer / tech is.
Bob