I know shopgoodwill.com has a less than stellar rep around here (not always unwarranted), but I managed to snag a TurboExpress with a copy of Super Star Soldier all for $112.
I was completely expecting to have it arrive with no sound of a bad screen, but other than some gunk in the speaker vents, it was in immaculate shape.
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It's not quite a found-at-a-yard-sale-for-a-buck kind of score, but considering I never thought I'd find one (let alone one that works) I'm pretty stoked.