If trading for a common Wyrm, I might ask for a small fee to cover the gap in rarity. If I don't get any offers that I like enough, I may decide to keep this Wyrm.

She comes with her egg, but no card and is unregistered. She has no damage. One of her teeth has a slightly "smushed" appearance, but this isn't from any damage and has been like this since she was made. I believe she's genetically purple, but has a black body. She's always reminded me of a vampire.
Most interested in:
-Chainmail Wyrms
-Scrapmetal Teslas
-Sluagh Wyrms
-Other Shriekers
-Nightmare Wyrms
-Wyrms with Pitchblack or Lace
Less interested in:
-Marine Wyrms
-Common Forest Wyrms
-Feline/Canine/Avian Wyrms
You can offer Wyrms from the less interested in category since there always will be some exceptions, but I'm just less likely to trade for one of these.