Cost of a used Colt Gmt

[Fjweld]

Hello everyone, I am a newbie to this forum and this is my 1st post. I have been looking to purchase a pre-owned Breitling Colt Auto for a few weeks now and wanted to know what a good price range should be. I have found an auto Colt gmt a32350 on the bay with no box or papers for $1500, the piece looks as though it is in decent visual shape, but the seller has no history as to original purchase/production date and year of service records. My question is, Is this a fair price? I'd love to hear your thoughts as well as if you have any insight in rep dealers that have Breitling autos no more than $1600 for sale. Thanks