Depending on "how retro is retro", got a 2002 Colnago Carbon Seatpost. It was used regularly from new then sat around for a few years. Good condition on the exposed Carbon (still glossy). The cloverleaf is faded by about 10% and some rubbing to rail clamps, but not at all bad overall. Total length from base to rail clamps is 210mm with 180mm usable to limit marker. Looks a little short but positive it hasn't been cut (i'm not that much of an engineering god), and limit markers are all visible as are torque settings, and lead-in at base is chamfered. Is a 28.0mm diameter, so will suit a C40/C50/E1 and maybe a handful of other carbon frames, but please check.
Anyway, i need the draw space to hide my credit cards, i can provide pics, unless someone would give me an idiot's guide to posting a picture. I don't really want the hassle of ebay, so was aking £35 posted to UK. Will ship overseas, but please ask for price.