I would agree with the "time of the year" comments and in comparison to what seems to be the current price for Mk 1's, the price seems OK.
But the other side of the coin is that for "just" another 6k you can get a Mk3. If you are after a quickish sale it may be sensible to widen that gap a bit but.
BTW I sold my TVR Cerbera by Piston heads, I had 4 responses and eventually sold it to one of them. Two of them were dreamers but they are fairly obvious and in fact did not waste too much time, and of course it was free.