Someone in the Roadster Forum said their build # was 35000+
darice57: I had a small accident and it was actually cheaper to replace the front bumper than to repair the original. Cost about $450.00.
And actually, for a brand new vehicle, I don't think we have had all that many problems. I think you will find most people posting here are quite pleased with the quality. Except for the manual transmission problem, which appears to have been only in the early build numbers, the problems really have been minor irratations.
The most important thing is to find a dealer that you are comfortable with!!!! That seems to be the biggest problem the owners are reporting here.