Hi Fillpoke and
Hmm, value of a Banks Europa, now that's a tough one. Firstly, at £18k for any sort of running Europa in above average condition is good value and if the car is excellent then it's extremely good and someone along the line has taken a real hit on depreciation. We have a forum member who worked for Richard (Banks Europa) so he'll be the guy to talk to about how much it cost to make these replicas and possibly even some history of this car ?
About investment ? Well, there aren't many around so I can't see them losing that much money if people are paying £10k for projects. Whether or not they'll gain in value is harder to guess. I'd say yes, but not as quickly as a genuine Europa. If you look at the 60's Elan market there's a few look-alikes (Evante, the CN Sprint) which came out and like BDA says, modified or replica cars tend to go for less than OEM ones.
Having said that, if the car still has it's original registration/VIN/Chassis numbers on the DVLA log book they'll be thinking it's an original S2, which of course gives you the option to return it to S2 specification should you feel the need for it. Personally I wouldn't but it's always an option unless the car was registered as "new" after Banks sold it and has a post '73 plate. Does it qualify for "historic vehicle" status by any chance ? If so I wonder if it's really an S2 that's been restored rather than a "made from new" Banks Europa.
Finally, should you buy it ? Personally I'd say yes, it's a bargain and the cheapest way into 60's style Lotus motoring you're ever likely to see with the added benefit that it's likely to be faster, stop better and be more usable.
If you want an investment then I'd say no. It will increase in value but nothing like a genuine Lotus car because people will always pay more for originality. Having said that, if the DVLA think it's still an S2 registered in 1968-71 then ultimately that's what it is, a Lotus that's been restored and had an engine change. Something that's reversible if the prices of Europa S2 cars warrant it.