Hi el_gogos
I did what the seller suggested and looked at David Daye’s website, and the price for a completed practice set to similar specs as the one he is selling is $615 plus $27 postage.
He is offering a case, an extra chanter reed and eezedrone reeds plus a pakistani half set minus the bellows on top of this. So if you get this sale for around the $600 start price, then you are not getting ripped off, even if you use the half set as a wall ornament 
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BTW with decent reeds (which the eezedrone reeds definitely are) and a bit of re-hemping, the Geoffrey drones can be made to work reasonably well.
David