I am starting to think about reducing the size of my old lens collection. (This posting is NOT a sneaky offer for sale -- please do not contact me asking about buying --OK?). Anyway, I have a nice set of LARGE B&L Protars (23" & 27" elements), front and back elements. They are in a good looking, but not working Volute shutter. My question-- would I be better off , come time to sell, if I invested in having the shutter repaired. Or, would the cost of repair be too much vs. the value of B&L Protars?(Therefore, sell "as-is")?