If you owned a 423A stamp and wanted to sell it, would you throw it on
ebay, start it at $0.01, and not bother on a cert? I mean, what possible reason would someone have to do it like this? "Gee, I wont invest $150 to increase interest and possibly make a boat load more money?" Obviously a 423A calls for a cert if you are selling it, doing anything less would be an unbelievable folly. This is one that will not be relisted, some sucker is going to get a 'Second Chance Offer' and buy it 'cheaply'.
Don