Despite being such an old aircraft, second hand Piper J3 Cubs are not as cheap as you might expect. Cubs have a certain romance and almost a cult following, and sell for more than they realistically should.  In the 1940s, a new Cub sold for $1595, which is equivalent to about $20,000 in today's money.  In the 1980s and 1990s prices shot up and some sell for between $100,000 and $200,000, but Cubs in excellent shape are available for between $30,000 and $50,000.  Cheaper ones are available if you look around carefully, but they may well need a lot of work doing to them.  According to one source, prices for used Cubs start at under $20,000 and can rise well above $50,000.  So there is a great deal of of variation when it comes to prices.