This is difficult and depends much on condition and who you are talking with. But, a good quality premium cigar from back in the day like a Partagas, Monty, R&J etc. in premo condition can fetch from $100 bucks to several times that. Clear Cigars being the ones made with cuban leaf, but rolled mostly here in the states can often be had for as little as $10 each, if you can find them. If you want more details on this, there are some cigar forums that focus on vintage cigars, I'm not involved with any of them though. Do you just want to smoke some old cigars or are you thinking of collecting them?