Hi there, this is my first post and I need help. I've been collecting G1 Autobots since the beginning of this year, and I have almost got the entire orginals. I need two cassettes - Rewind & Ramhorn in good condition. I have also been customizing my collection with upgrade stickers (from Reprolabels.com) and custom made accessories. I need some long smoke stacks from either Optimus Prime or Ultra Magnus - so I can upgrade my Commemorative Series Ultra Magnus. I am also on the lookout for an E-Hobby Silverstreak (anime version) as it would improve my collection. I would be willing to exchange the above items for a Masterpiece Optimus Prime (loose but with all accessories and trailer).