I'd buy it.
Makes sense really, 30p premium or so per egg to save the hassle of...
Filling kettle, putting it on, waiting for it to boil, taking it off, putting on hob, adding egg carefully, waiting for it to cook, taking it out, putting it under cold water for a bit, then carefully spending the next minute or so peeling off the damn shell and all the fiddly little bits that get left on if you mess it up.
So, 30p to save 2 minutes of effort.
For these eggs to be worthwhile on a logical "time = money" basis, you would have to be earning over £9/hour. For anyone earning less than that, boiling your own eggs is a much more sensible investment.
I also like those little cheese slices (not american cheese), and pre-chopped/ peeled/ washed carrots.. much less faffing about involved.