Sold for $84.02: https://i.imgur.com/cIRiVNn.png - https://marketplace.tf/items/477;5;u3012;uncraftable

Keys were around $1.83 when it sold: http://manic.tf/keyprice/?at=2018-09-28

$84.02 / $1.83 = 45.9 keys rounding to 46

2 exist, I owned both of them, had one for sale since the beginning of the year and had been slowly lowering my asking price throughout the year and it has finally sold. I had it listed at the selling price for about a month or two.

So I made this suggestion like 20 days before Halloween. Now Halloween is here and to my understanding Ghastly Ghosts isn't available this year (unless the effects listed on Unusualifiers are wrong?), sure it might be available again in the future, but there aren't going to be any new ones this year.

Also still have zero interest in selling my remaining one, so unless the person who bought my other one resells there won't be any more sales of this in awhile.