The bike came in two versions as TVT built the bike. Look had most of the distribution rights and sold most of the frames as people wanted the cache or riding the same bike as Hinault. Eclipse had rights to sell in the US. More discerning buyers bought it to save $. Some merely changed out decals. The only option was the fork - carbon or aluminum. Frame retailed for 3000-3500. Fork was 600 cost, retailed for 1000 in the States. Most frames, regardless of being Look or Eclipse versions, were outfited with shimano dura ace or campagnolo super record.
Value? Wide range based on size. Groupset and condition in the right size, if original, is very collectable. The difficulty, is finding the right buyer as there are not many and most are not serious collectors, thus, they do not see the long-term value of this rare frame.
The Eclipse tends to go for less as most do not know about the brand or rarity. It is very rare compared to the Look. Watched both sell for the past 15 years and it is all about timing and matching a great model with the right buyer. $300-$3500. Had a serious collector offer $3K a while back which in today's market is very good. As it was my 30th birthday present and my first top-of-the-line bike, I was not willing to part. About the only time I might consider parting is before I die to give the kids some cash or if I see a perfect C-59 and dont have the pocket change to cover.
Eclipse provided me with the last frame in the US, a 56cm. Also, provided a second set of Eclipse decals as well as the Hinault Look Decals. Good luck on trying to find which serial numbers were provided to Look v Eclipse. If found, please share as well as the source. Thanks