I went to last year's flea market and one thing I suggest is to bring cash. Sure, some vendors to accept credit cards but at times their ipad wasn't working or the line was long, etc.
As for cost of playbills, I agree with others. I recall most are $1 each in the beginning but later in the day just like at any flea market, they have more discounts, etc.
@georgeanddot, if you go to bway flea, try to check out the auction in the afternoon. For some reason I'm always intrigued by a live auction... seeing people wave those paddles with confidence, feeling the electricity in the air, wondering who the proxies are talking to on their cell phone, etc. Last year, I recall bids for the Springsteen Opening night + afterparty reaching over $10k! Perhaps someday I can participate too! lol