1999 and Earlier Error Cards

I have a bunch of old school Pokemon cards (about 500-600), and I saw this thing online with a list of all the old school error cards, and checked if I had any, and it turns out I have about 60. I'll list them, and I want to see if anyone can tell me how much they're worth. Also I checked an error card guide online that said that the Metapod and Caterpie cards were only available in 1st Edition, but mine are shadowless. Any ideas?

5 Bulbasaur with Length/Length instead of Length/Weight (Shadowless)
1 Kakuna with Length/Length instead of Length/Weight (Shadowless)
5 Metapod with HP 70 instead of 70 HP (Shadowless)
3 Caterpie with HP 40 instead of 40 HP (Shadowless)
6 Pikachu with red cheeks instead of yellow cheeks (Shadowless)
9 Voltorb that say Monster Ball instead of Poke Ball (Shadowless)
3 Voltorb that say Monster Ball instead of Poke Ball (1st Edition)
5 Vulpix that say HP 50 instead of 50 HP (Shadowless)
3 Vulpix that say HP 50 instead of 50 HP (Unlimited)
7 Sandshrew that say this attack does nothing instead of that attack does nothing. (Shadowless)
8 Seaking that say Put Seaking on the Stage 1 Pokemon instead of Put Seaking on the Basic Pokemon(Unlimited)
7 Rapidash that say Put Rapidash on the Stage 1 Pokemon instead of Put Rapidash on the Basic Pokemon (Unlimited)

I also have a ton of shadowless cards (about 200), and I want to know if those are worth anything. I don't think any of them are rares, though.
-Seth

I know that the Pikachu goes for a good bit... check the price, I remember it being 10-20 U.S. $ each.

I wonder if they made some cards shadowless on purpose...