I got my PC-FX off the late Rising-Stuff.com - if I recall right I didn't pay much more than $120 and I got a pretty decent bundle with a loose PC-FX with controller and hookups, Battle Heat and Little Cats - and I bless the lost site for making me a sort of fan of the console, in particular making me the closest thing anyone in America probably has to a "Master of Battle Heat". Unfortunately I may never be able to afford legit copies of Zenki FX and Zeroigar, or backpedal on my NEC Consoles and get a PC-Engine, but I've managed to get good mileage out of the console with Battle Heat and Pia Carrot.

An eBay auction appears to be here;
http://www.ebay.com/itm/NEC-PC-FX-Co...item4160c419c6

So far it looks like that's the lowest you'll see a PC-FX, but considering the bids that may not last.

I should probably pop in the pcenginefx forums sometime...