I just wanted to update to say that as of this morning, I have a cash offer and an arrangement with a buyer to deliver the seats later this evening. I wanted to post so that if said buyer were reading the thread, he wasn't thinking "but, I've spoken for them and the ad is still active." Also, to keep things updated for others who may be looking.
I will update once we've made the transaction, but I think we've got a win/win arrangement that's going to work out well
Thank you to everyone who took an interest. I wish I had more seats so I could meet up with more SMB-ers
Edited to add: I delivered the seats and bases to their new owner this evening. All went smoothly, good people, and a sweet looking RB 4x4.
Thanks to everyone who inquired, and to MB for amazing design work and helpful input (I considered keeping the passenger seat base and making a clear acrylic top for it; coffee table art!)