The car is beautiful and nice original black JPS cars aren't that common so I'd expect a premium.
Having said that, I have no idea about current market value but I have noticed that the earlier S2 cars are creeping up over here in the UK, which should be reflected in your car as well. This year will be the 50th anniversary of the original S1 and as the 50th anniversary caused a surge in Elan values, the same could be true here if the Classic press gets behind the car (or needs column inches filling
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Restoration projects and running cars sell easily and relatively cheaply but we all know the real cost of restoring an old car, so don't let that drag your valuation down. I think with these cars it's a case of just waiting until a buyer comes along, so patience is needed.
Personally I'd have a word with Richard because as probably the "go to" guy in the UK for Europa's he'll know the market and might even get calls asking if he knows of any for sale. The other place you see them cropping up is Paul Matty's, again a phone call to get a feel for the market there might be worth a shot.
Brian