The first signature says 'Iran Qom Mehdi' but I don't think it is a true Qom (maybe outlying village). Second says 'Bahbahai' and the 3rd 'Qom Ahrmai' (excuse my spelling!).
Again, a lot of rugs are signed Qom which aren't actually from Qom, or even Iran. But they are nice enough silk on silk rugs.
The afghan is an typical Andkhoy/Kunduz or possibly 'Beljik'.
I don't think you are being ripped off for any of them but that doesn't mean you shouldn't try to negotiate down - you may be able to reduce the prices by 10-30%?