I agree it that £400 is a large sum of money to add a little red dot, but when you think how much Zeiss parts will be and skilled labour it doesn't surprise me.
The scope will have to be stripped, reticle swapped out, wiring sorted, switch added etc all in a clean dust free workshop to a level that will last a lifetime.
I think the scope cost £1300 new (two yrs ago)...how much to sell on here? £900 ? ? and a new Victory equivalent ~ £1650 then the original quote doesn't seem so bad...