Thank you! The Gyarados is the roughest of the bunch overall but I have been relatively lucky with listings so far.
The heads up on the Trainers is very much appreciated; there’s a helpful thread from @hayo and I can see how easy it would be to pick up the wrong thing…a good reminder of how little knowledge the grading companies can have. I would love to see some pictures of your collection if you haven’t a thread already, looks like you had the right idea collecting these from the off!