Looking for some advice from the Transformers experts here. I've recently been going through my collections and doing some purging and sort of refocusing on what I want to collect. Through looking at all my toys and watching YouTube videos like retro lasting it has reminded me of why I got into a Star Wars and all the rest of this: vintage stuff.
Anyways, along that line I have sold off the majority of my modern Transformers (which wasn't a ton), with an eye on focusing on getting some of my favorites from childhood in either G1 form or a reissue. My first goal, and this might be down the road a bit with Last Jedi stuff ramping up, is getting a set of the original 5 dinobots. I've just started looking around eBay a bit, and I'm wondering if there is anything I should look out for. Some of the prices seem a little lower than expected so I didn't know if there were repro things, etc. out there. I don't necessarily care if it is a reissue or "commemorative" toy, that is what my Prime is, but I'd like it to be authentic beyond that. Thank you for any advice.