Someone got a great deal yesterday on a Lost in Space Signed numbered P3 promo card # 315/600 @ US 19.50.
Was going to bid but got sidelined and forgot .

I see a bunch of Inkworks LOS promos, some signed by Jonathan Harris and some by Mark Goddard, most numbered to 600.

Where were these available, the signed versions ?

Another Harris one sold for $ 100.

Not sure about this and I thought that I knew most about Inkworks promos
As they have the Inkworks authentic embossed cachet on them Inkworks made them for a purpose.
Wether they were randomly inserted or given as an incentive I can not say.
This goes for the Mark Goddard ones as well
I do not have either.
My feeling is that they were inserts.

I don't remember these as being inserts in the set so i'm going for available to purchase at the inkworks booth at comic con however i cannot confirm that as being true.

Never thought of that
Seems logical

Both the Harris and Goddard autographed promo cards were pack inserted in their (Inkworks) Lost in Space Classic card set from 1997. The Harris ones were both numbered and unnumbered.

Ok that now explains it .
But was it on the packs that it was inserted at a rate of so many packs
Have not seen a pack so can not say

That I don’t recall, but I know I have at least a couple of empty wrappers somewhere. If I can round one up, I’ll let you know what (if anything) it says Piko.

Allender's site notes that the autograph cards were also sold separately.

The NSU June-July 1999 price guide supplement lists the autograph cards but not the insertion rate. "The Encyclopedia of Non-Sport & Entertainment Trading Cards" says just that they were randomly inserted. I'm just guessing but I think each could've been as rare as 1-per case outside of the ones that might have been sold outright at shows.