I am not sure why you are so convinced about the shill bidding ,and how besides being an expert on pricing non numbers matching cars it seems detecting shill bidding is anther of your fields of expertise. To me though the bidder in question has over 1100 positive feedback and only 2 retracted bids. I have over 300 and I also have two retracted bids and I have never been a shill bidder, that I know of, but maybe someone who specializes in that field can double check because by your reasoning I am one!
If this guy doesn't relist because the buyer doesn't have the money or his wife says no (common reasons mentioned in relisting) because this happens a lot when selling on ebay. This gives a realistic value on these cars. And shows people want them because unless someone finds an underground bunker filled with a 1000 firebirds somewhere the number available on the planet will only get smaller! My advice: want one? Buy one! because soon you wont get anything nice numbers match or not!
Restored by me. Not a professional. Restaurant worker by trade. YouTube forums and some trial and error built this beauty. Sheet metal replacement. Body work. Paint. Rear gears. Interior. And engine. ALL ME. Toot toot