I'd really like to see you get a receiver with hdmi 1.3 for the lossless audio on BR and HDD discs but I'm not sure your budget (which you still haven't confirmed) will be enough, even for a used one. Something like that Onkyo RC 160 I linked to would work for the audio but you never know what else might go wrong with it as soon as you hand over the money. But buying used can be a big risk. However, I buy most of my stuff used, but only if it's in prestine condition.
If you really want to keep the price down then look for a good used receiver that's not more than 7-8 years old (it may or may not have room correction) for around $75. Anything older than that might not have the basic features like bass management or will be a higher end model and out of your price range. The Denon 1400 and 3200 you linked to earlier don't have enough digital inputs for all your sources. If your patient you might stumble accross something on CL that will work for you.
Otherwise, Dakmart.com has an old Denon 685 refurb for $99. AC4L.com has Onkyo refurbs starting at $125.