some of the older books talking about trading (confessions by brutus is one i'm thinking about, from 1972/1973, but darvas as well) cite those reasons for trading more expensive stocks.
basically, your cost would be based on number of shares traded, so don't go for a cheap stock but go for the more expensive one.
btw, i started trading in the 90s with etrade, i think it was 19.95. around 1995, i think - but my experience with baseball cards for almost 20 years before that gave me a primer on "sell when the ducks are quacking". bb cards in the 80s were like some stocks in the late 90s; you could always get rid of them at some price that wouldn't kill you, even if you had a dog card (stock).