if it wasn't for second-hand trading, like at car boot sales and eBay and that, i wouldn't have just been able to buy Thousand Year Door for £24.
or Maniac Mansion for £1.99.
Or all those retro Master System games I love so much. Not that I don't like Sega, but they can take a running jump to themselves if they think I'm gonna pay £19 for "Spellcaster" (£2.99, bargain).
I buy plenty of games new, but sometimes it just isn't practical to buy every game new. And if someone gets a cheap 2nd-hand game and likes it, chances are they'll be more alert in the future when a new game is released anyway.