Here's a very clean Esterbrook A101 - in gray, with a simple aerometric (squeeze fill) system and equipped with a 2668 nib. Brian Anderson's Esterbrook.net has a bit more info on this particular pen. The pen I have right now is pretty much free of mars or anything I can see; only flaw of this pen being that it has a pretty light imprint left. How is $30 shipped (as usual, shipped being with Priority and insurance attached CONUS) for this nice pen?
I'm also still selling Wearever cartridge pens (the clear, green, and gray ones)... three for $10 shipped to your location (just add $5 if you're taking the Estie A101 too!)
Will take PayPal or USPS MO gladly - if the price is too high, feel free to bonk me over the head and shoot off a PM or e-mail for an offer.
Thanks, Anthony