I do like it and It certainly has its uses. A great project for a Pay Comparison site. Probably plenty of agencies (by country) willing to advertise on a well developed site. I'm going to bypass the obvious PAYG for a minute
It's really difficult to put a price. Purely because it's not really an instant use domain, its going to require a large investment. imo. and the data collection part will be a challenge. I can see why the Country code domains might be taken, far easier to collect data on a single country basis. Maybe a US business will run with it.
I haven't missed the obvious pay as you go - it's just they are mostly all branded and I don't really see Paytalk as a great brand name, It kind of alienates all that contract business