As might be expected the quality of the finished car would be dependent on the skills of the builder. Surviving examples exhibit all standards of build like many kit cars of the late sixties and early seventies.
If you want one....
To find out if there any Siva Edwardians for sale contact me on sv1172 at aol dot com. Also keep an eye on Ebay as Siva Edwardians turn up occasionally. These have been restoration projects, part completed and fully working cars. If you have a Siva Edwardian for sale then send me the details and I will advertise the car on this site. As to values, the price can range from £1000-£2000 for a restorable example with a car in running order fetching £3,500 to £6,500 depending on the level of finish. Exceptional cars can fetch considerably more in 2023 possibly due to the DR Who 60th Anniversary. Above all these cars can guarantee cheap fun and economical motoring!
Tattered examples still turn up in all manner of locations - sheds, barns, garages and often under the remains of a tarpaulin sheet! There have been a number of new finds last year - 2021. It really is surprising that examples are still emerging blinking in the sunlight from sheds and barns. It seems that no one likes to throw them away!