There's a shop near me in Worcester, MA that has/had a TG16 with power supply, two pads w/tap, a TurboBooster w/AV cables, and two chips (I think Keith Courage and Vigilante) for $120. I seriously thought about buying it, but I just didn't need anything in that bundle.
That said, I also think $60 is a fair (but slightly high) price for the TG16, if it's as you described and actually works. Make sure there's no bent/broken pins behind that expansion port cover. And the benefit to buying from a store is that if something doesn't work, there's someone you can bring it back to, unless they're unprofessional so-and-sos.