prices of astons vantage 1988- 89 and Vantage V550

[ermenasce]

I just joined this forum.
I am a car fan, a car collector and I always loved Astons.
I have a 2001 Vanquish, which I believe is one of the most beautiful
cars in the world.
I am looking to buy either an Aston coupe V8 Vantage - years 1988 or 1989
or a Vantage V 550. They have to be either totally restored or with few
original miles.
I would like to have your opinion of the market value of both these cars,
taking into consideration the present change in economic conditions in the world, and particularly in the USA.
Thanks for any advice