What's the crown jewel in your guys' collection? Mine is a mint condition Generation one Optimus Prime complete in its box, box is beat the hell and missing the flaps on one side, but the toy is in pristine shape.
For Transformers it would ironically be the 3P Megatron, Apollyon. Finest Transformer I've ever had. Never would have believed it myself a little over a year ago since I didn't even glance at or consider 3Ps before I got that one. Other than that, probably either MP-13 and all his cassettes or G1 Jetfire but mostly for its Macross roots and how much better it was than all the other Transformers as a toy back then.
Cloud Rodimus! One of my favorite molds and characters make for one of my favorite figures. He's the "crown jewel" for that and his rarity. I was lucky and got him a few months ago for a reasonable price (About MSRP albeit loose).
I dunno, Grand Max? Black Zarak? Big Powered? Grandus? I don't consider any to be the top jewel, but i guess those would be in the running if i did
I don't have anything extremely valuable. My most prized transformer I suppose is my Disney Label Optimouse Prime for sentimental reasons. After that it's a tie between Combiner Wars Ultra Magnus, Classics Voyager Megatron and Optimus Prime, and G1 Reissue Soundwave.
My crown jewel right now would have to be my MPs. They are what I always wanted my G1 toys to be. Can't wait to one day add MP-10 to my collection...
Masterpiece Eva Mode Convoy in all its absurd glory. The magnificent purple bastard has no real reason to exist but it does and I'm ecstatic about that. It gets swept from the throne the moment I get an MP-4S though. G1 Fort Max takes second. G1 Thunderwing gets third.
My Sky-Byte shrine, LGEX Black Convoy, Clash of the Transformers Megatronus, GDO G2 Megatron, AoE Evasion Prime, CW Superion and Menasor, LG10 Arcee.