I would be much more interested w/o all the modifications and a stock interior. But $28-33k. No way it is worth that much. I haven't even seen any original true Lotus Sevens selling for that in this recession. Plus, there are nice Bruton Stalkers available currently for far less. Remember, a car is hole in the pavement in which you can pour money.
I have a Westfield and offered $28,000 by a local man in the area. Probably will not get this much if my engine is Zetec. The man was very facinated with my Honda S2000 engine.