You'd really need to go and look at them to fully realise whether they are worth the money being asked of them. But checking on here first as you are doing is a good starting point.
To give you an idea on price, I bought my X plate GTV V6 late last year as a stop gap but also to scratch an itch on owning a GTV. Mine now has 56k miles, FSH, is Black/Black, Cambelt / Clutch / Oil pipes etc done at 50k and in my short ownership I have had it serviced, replaced the front lower wishbone arms, fitted a new bespoke exhaust system from the cat back, had two new P Zero Rosso's fitted to the front wheels and have had the car detailed. I've also put it on a rolling road to check it's putting out healthy power and it is. The car is in great condition both mechanically and aesthetically and pending my interest in another car (CLS55 AMG), then may be up for sale in a couple of weeks time. However, I will not be putting it up for the price of the cars mentioned already on here, it will be up for a chunk less.
Take your time as the right car will be out there...