I did use a customs agent to handle the import paperwork, as this was the first time. However, I think if I was to do it again, I would probably just do the paperwork myself. It is not that complicated for a 25 year old car.
I have my Peugeot 205 Gti for sale currently on ebay
http://cgi.ebay.com/ebaymotors/Peugeot-205-GTI-1988-Peugeot-205-GTi-1-6-very-rare-registered-in-USA-restored-and-super-clean-/281153535415?pt=US_Cars_Trucks&hash=item41760e7db7&vxp=mtr
I recently imported a 25 year old Peugeot 205 GTI. It was pretty simple to get it titled and registered, however I now need to sell it due to financial committments. It is currently for sale on ebay, if anyone is interested. http://cgi.ebay.com/ebaymotors/Peugeot-205-GTI-1988-Peugeot-205-GTi-1-6-very-rare-registered-in-USA-restored-and-super-clean-/281153535415?pt=US_Cars_Trucks&hash=item41760e7db7&vxp=mtr