Plain English reply:
The gist is that there are glow back variations [unlistable on the site] and this new variation coming to light will somehow create more demand, shooting the value of these cards "through the roof" - which I can only guess means that what was once "worth" 5 cents apiece will now be 10 cents apiece, but we'll have to keep our eyes on the market to see how far off my estimate is.
In a slightly more serious note, if you put a list of your needs together, someone on the site might be willing to dig them up and give you a good deal to finish your completist set.
Shakespeare for Dan:
The gist is yond th're art gloweth backeth variations [unlistable on the site] and this new variation coming to lighteth shall somehow maketh m're hest, shooting the value of these cards "through the roof" - which i can only guesseth means yond what wast once "w'rth" 5 cents apiece shall anon beest 10 cents apiece, but we'll has't to keepeth our eyes on the marketeth to seeth how far off mine own estimateth is.
in a slightly m're s'rious noteth, if 't be true thee putteth a listeth of thy needeth togeth'r, someone on the site might beest willing to digeth those folk up and giveth thee a valorous dealeth to finish thy completist setteth.