I've got some Kodachrome 25 and 64 of various ages that I'm never going to get through before the end of the year. No boxes or dates, but it's all been cold stored since I bought it. I've shot several rolls of it (some of the oldest ones too) and they've all come out fine. $6/roll for the 64 and $12.50/roll for the 25.
I'd totally be down for trades too. 35mm/120 film, beseler 23C negative carriers, B&W paper, whatever.