I have a blog for glyphs I've sold. These were all on SC and I didn't start actually selling for more than 2-3 fg per glyph until I reached tier III, although there were some nice tier II glyphs in there. Now with overspawns it's very possible to make some really nice tier II glyphs... In any case, sometimes glyphs are quite needed/used on SC and sometimes they are basically worthless... Since I was always holding a ton of maps, pots, and other "items" it didn't make sense for me to just wait for when they were needed, so I sold basically the same glyphs sometimes for 3 fg, and sometimes for 20 fg depending on demand. Right now is a very low time in demand for SC and the market is pretty flooded with really nice glyphs for 1-3 fg, so it's kind of impossible to sell any (i.e., yours would all be like 1-2 fg each on SC atm... but maybe 6 months ago you could probably get ~4-5 fg each for the ones suffed to 20 min+. IDK what the market is like on HC, so this isn't a pricecheck, but hopefully this helps.
https://forums.d2jsp.org/topic.php?t=75079780&f=276