Timbo

I'll try to answer to yr questions

A complete Marstrom Tornado ready to sail is EUR 27,000 ex factory (tax and shipping excluded).
At the current exchange rate roughtly USD 32,100.
This is for the "basic" version (you can pay quite a lot more according to yr preferences for sails, spinnaker setup and rigging).
In Europe a complete Capricorn in the average racing trim is EUR 16,250 (VAT excluded)-EUR 18,500-19,000 (included VAT).

Actually I do not think that Marstrom is interested to build a F18. Tipically a F18 hull scales up at 100-115 lbs (45-52 Kg). Personally I attended the weighting of a Capricorn hull: it was 104 lbs (47 Kg) with fittings.
Consider that a M20 hull is 57 lbs (26 Kg) and a rock solid Javelin 2 F18HT (in plain glass and vynilester resin) is 70 lbs (32 Kg). As you see the weight limit set by the F18 rule is unable to keep down costs, but makes the boats unnecessarily heaby by 30-40 Kg.