ESS AMT4: Worth repairing?

I have a pair of these which need refoaming. Does anyone have experience with this speaker such that they might offer advice as to whether these 10" drivers are worth the repair cost, or is it smarter to just buy new units and install them? The ribbon drivers seem ok as far as I can tell. From the looks of it, the locals here want about $110 to refoam the drivers for me.

Or, if repair makes sense, does anyone have tips on a good shop to use other than our locals here in Portland (well thought of, Fred's Sound of Music btw).

What might these sell for in good shape?

thanks all,

eno