Good price for a used DS Lite?

I'm in the market for a DS Lite, and everytime I meet someone on Marketplace or in shops, the screens are all but cracked, don't play DS games and/or have a broken hinge.

Is it worth it to buy from like DK Oldies (even though their prices are very high) or even "renewed" on Amazon?

What would be a good price for a working DS Lite, good screens that plays games?