You can reach for it, but it ain't there no more...
I can understand going either way with the F75 post Equinox (i.e., either keeping it or parting ways with it). I have kept my F75 (which ergonomically in terms of balance and user interface, I believe is the best detector ever), but admittedly it is collecting dust with Deus and Equinox and GPX in the REALLY tough dirt getting most of the run time.
But I can't seem to give up on my F75 regardless, if for no other reason than I am hanging on to a detector that can still accommodate a concentric coil. It is for that reason I decided to sell my T2 which was the backup to the F75 but could not accommodate concentrics. Needed to thin the herd. I also have an MXT which I think is redundant to the F75 but in their own right are just two of the greatest VLF relic machines before Deus and Equinox showed up. I cannot part with either of them but will likely need to get rid of one or the other.