These do not even fall into the "it might be fake so I'll only bid 10% of catalog value". That legend is engraved on the tombstones of those who buy from NYSt***s and the like. My experience is that, particularly on eBay
, people pay close to nothing for suspected Persia/Iran forgeries of this era; they are that suspicious of forgeries from that country. With references like the Persiphila catalog, I have been able to pick up lots with forgeries but including clearly genuine stamps extremely cheaply, including a few items that turned out to be signed by experts Dr.Dadkah or M. Sadri.
If you sold these individually, the suspected reprint as a reprint, and the forgeries would be worth a US dollar or so each. So you did not lose in buying these for €4. But should you be expecting any to be genuine at that price especially without any reference or expertise?
And thanks to floortrader for suggesting fraud in selling these, even though it wouldn't get the prices he suggests. Shame!