Sell this neve.. or pay to refurb into my 500 rack?

That's the Neve "formant spectrum EQ". It has some unique features. The shelf curves have a hard knee, unusual. It also does + - 18 db. I've rebuilt many in 81xx consoles. It will run on + - 15 to 18 volts, 15 is better for longer opamp life.

Use some LME49740 quad opamps and it's silent and clear. Then all those crappy 100 uf 4 volt el caps can all be shorted out. Use some Wima FKP-2 polyprop film caps in the two upper bands and it's sweet. I have no idea how to fit it into a 500 rack as you will need to make it fit. The front panel is part of the module with a plastic overlay.