Curing tobacco just takes so long to do that most people won't bother. It has to be fermented and turned like a compost pile, though of course, under more controlled and sterile conditions. You need a nice airy barn to do a batch right. I found links about it:
[link to totalleafsupply.com (secure)]
[link to dengarden.com (secure)]
[link to www.coffinails.com (secure)]
[link to www.instructables.com (secure)]

The traditional corncob pipe has another purpose besides a convenient shape for pipe-making: it cools down that homegrown tobacco! I've mixed a little fresh cornsilk in with my bulk tobacco, when it was too harsh to smoke, to do the same thing. Producing corncob pipes for people's harsh homegrown tobacco might be a good barter but I'd never barter the cured tobacco: it takes too long to get a good product and you could lose it all at once if people know you have it.

Would you barter homegrown pot? I mean even in a state where it's legal to grow? I'd never do it no matter how legal it is: it's one of those things that people get too fond of and 'crave' and might do about anything to get it. No pot, no tobacco, no liquor, no pain-relievers of any kind: all are guaranteed sellers at high prices and everybody knows it. I wouldn't even barter with a close relative who isn't at least 75 and more likely to know how to be discreet.