Sounds like an Exclusive, I've got #114. It's got the door sill numbering you mentioned. It's also got the following features:
Full Leather Interior - It's a kind of light gray colour.
CD Multi-changer - It lives under the drivers seat.
BBS Alloys - They're multispoke, unlike the OZs that came on other Ph1 172s. Now, in the Renault press pics I've seen these have BBS centre caps, but mine are Renault :S
Scarab Green - They only came in this colour. If yours is silver it's either been resprayed or it's a ringer.
I thought they only made the Exclusive in 2001, as this edition was produced to mark the end of production of the Mk2 Ph1 Clio, but I'm not totally sure.
Best way to be sure if it is or not is do a HPI check, you can do a basic check on the RAC website I think, just means you can check the Reg.
Personally I don't think these should command a higher price, as the changes are nothing fancy. (I.e. It's not the Ph1 172 version of the Trophy) So don't let the seller shaft you just because "It's an Exclusive..."
:approve: