Question about value / possible sale of the above model (no pictures right now but can post some if there's interest)

Was given this model (shown here - http://www.swapmeet-models.co.uk/exoto/97029-tyrrell-stewart.html) directly by the country manager of Revell whilst I worked on a UK toy magazine. Revell had previously distributed/sold the Exoto brand in the UK and had had this model signed by Jackie Stewart (no proof of this however... not that i'm suspicious at all but appreciate some will want it).

Anyone here have an idea of value? Point me in the direction of a shop/trader who might be interested in buying it? Anyone here want it?

Thanks in advance...