Vintage and JPS (see Makers tab above) are very similar in their pricing. JPS lays out the prices for nearly all options, except for custom requests, in their new updated site. Vintage has all their basic option prices at their site too.
To give you a ballpark number for a JPS or Vintage, plan on at least $19,000 for entry level with a few small options. I think that with engine, transaxle, canvas, etc upgardes you will be looking at 21,000 to 25/26,000. That will buy you a heckuva car.
Intermeccanica? I do agree with George that the Roadster (59 Convert D) and new Speedster (58) that Frank manufactures are the cream of this genre.... however his pricing is a bit off, probably because it's based on the $$$ he bought at a ferw years ago... BTW, he has a beautiful & exceptionally equipped/powered car. When I was buying 16 months ago a IM Speedster with roll up windows, and equiped with the smae/similar options I eventually ordered from VS. cost $13,000+ more than the Vintage (and probably a similar JPS). Not only that, the wait was 6 months plus before they started on your car. I think the current waiting time is at least that. Having said that, I still think the IM car is primo and worth the $, if you are looking for an all weather driver that can equal a Z-3 in comfort and blow the doors off all Z's except an M-3, and also a car that handles far superior than the original. I may buy one some day.
JPS puts out an outsanding product and you will find many devotees on this forum to both JPS cars & it's owner, John Steele. Check out John Leader's car under the registrty for a prime example.
Vintage was my choice because of the owner, Kirk Duncan, has a reputation for honesty, A+ customer service, and accessabilty. VS has been in business for many years, and has produced the majority of replicas you will find on the street today. I am toatlly satisfied with the car (see Dub U Tub under member's files), and Kirk has been true to his reputation, I think he exudes the best in attributes, especially in this industry (relicars/kit cars.) Both John Steele (JPS) and Frank at IM have earned the same level of respect.. I think any of the 3 will meet your expectations, once you define them.
Hope this helps. The beautifuul thing? If you buy IM, VS, or JPS... then you can be assured that you wil get a quality product.
Jim Ward OKC, Temp STL.