Al- the continentals are bulky and sell for a lot less than the other Bally EM models. I have seen them go from $400-900 on the real collector's market. I've also seen the tourist trap slot stores sell them in the $1500 range, but that's way overpriced.
check out: http://www.californiaslots.com/
they're not the cheapest, but they sell machines of decent quality; use their prices as a "ballpark" reference.
MP