T206 set advice for my 5 year old!

[jonvancouver]

So my 5 year old son and I spend the 30 or so mins before bed flipping through my T206's and T205s and he is taking a very keen interest in them. It's hilarious to see him know the difference between the backs, the names of the players etc.

My question is: If I wanted to start him on a set, and wanted the cards to be raw so he could actually get an appreciation for the feel of the cards, whats the smartest way to do it? I couldn't really get him nice raw stuff because the probability of them getting bent etc is high.
Maybe just get him the cheapest examples possible to start? And what would I expect to pay for that if I wanted to buy, say, 20 cards in one shot.

Thanks!
Jonathan