Mine is a 2008/57 plate with 210bhp and yes, it was a special edition, only available in red, black or grey.
They all had mettalic or special paint, visibity pack and electric memory seats, but all have black interiors, and as you couldnt add any options, none have xenons satnav or sunroofs, that said they have virtually everything else.
Price it as per a Lusso plus a premium of £1000.00 as that is how an '08' is priced in Parkers.
When we traded the 147 recently, there was a massive discrepancy in value between CAP, Parkers and Glass's price guides, they are just that - guides.
Daft thing is, the Ti was cheaper than a Lusso with Blue and Me (optional that year) and 18 inch wheels at the time, so it was tremendous value for money, although as a special, there wasnt as much discount available.