Guatemala Missing Perfs EFO

I'd like to know if EFO is the proper term or is there a better one?
I visited the PO in Uspantan Guatemala yesterday and when looking over the stamps in stock, I came across this. I check every sheet and this was the only one with missing perfs. I frequently see one missing perf but this is the first I have seen in 27 years with 3 perfs missing and it happened twice on the sheet in the 3rd and 4th row, left stamps. Any possibility this might carry a small premium?

My inclination, looking at the poor, but just visible, perforation in the other lines is that the poor perforating machine was just clogged to the gunnels with rubbish and noone could be bothered to clean it out. If so it is of minimal significance though on ebay it will be advertised for obscene amounts of money marked RRRRRRRRRRRRRRR at least, possibly more.
It will be slightly more interesting if it is shown that it is a constant fault caused by a breakage on the perforator. But not very much more. I mean, if this was on some early classic stamp that people are still trying to plate, it might be sought after. The plating of modern Guatemalan stamps is unlikely to become an Olympic sport.

You could find out how the sheets were perforated. If a rotary perforator was used then it is not unusual for there to be inconsistent perforations when the machine starts up or stops as it is a gradual process to get the rows of pins on one drum to engage with the rows of holes on the other drum... this is called "fading out". To be imperforate there must not be any trace of an indentation.
In my opinion, I say that the sheet value is DECREASED by poor perforation.. unless it is to be kept as an "oddity"

Thanks, I appreciate your opinions. I can try to find out what kind of perforator was used. There is no trace of any indentations. You both have given me some nice information. I may try ebay, but if I do, I would only mention the missing perfs and not prey on gullible buyers.