They're not horribly bad matched with weaker bass feedback DAP's like the Ipod, and are pretty comfortable, but it won't give you any kind of isolation at all and as we discussed has uneven balance so it's definitely not for everybody. If you like Bass, want comfort, no isolation and can get it for around $50-60, then it wouldn't be a bad choice. If you consider getting one from ebay as you mentioned btw, make sure they aren't fakes (although, from some stories, the fakes actually sound more balanced than the actual ones! lol)
As for others, it largely depends on your music preferences. Do you like balanced sound, or treble/basshead? Just as a general guideline, here's what's usually recommended in your price range:
IEM's: Nuforce NE7, Head-Direct RE2, UE metro. fi's, JVC Marshmallow, Creative EP630
Clip-ons: Koss KSC75
Buds: Yuin PK3/2
Headband/fullsize: Sennheiser PX100, Koss Portapro, iGrado