In that website 1 cent. bid costs you like 1$ to purchase.
Everytime you bid, you are covered some moments later by another bidder, which in many cases is a website admin with an account with infinite money or a bot.
Those websites are a scam...
There's only 3 ways of getting a 3DS for 50$:
1) Buy it in 2016
2) Find someone else to pay the extra 200$ (assuming it costs 250$)
3) Buy it from someone who stole it from a kid and now wants some quick cash for white dust.