NobleSpirit's descriptions are
pretty ridiculous, but they are also mostly boilerplate. Apparently, everything and anything is "an area that is highly sought after by collectors, specialists and investors alike". But there are always plenty of photos of the actual items for sale, and that's more important.
Consigning this kind of stuff to NobleSpirit is a shrewd move on OP's part IMO. Unless you are willing to use them for postage yourself, I suspect that's probably the best return you'll get for such material. These are mostly low-denomination blocks, so even the discount postage market doesn't really want them. NobleSpirit's followers, however, are another story -- there are a lot of them, and many of them are beginners who might not even have these stamps. Watch somebody snipe these lots at the last second for near, or even above, face value. ( eBay
is entertaining, if nothing else.)