I got a case of 1000 rnds Fiochi 230 gr FMJ at a gun show for $165. I've picked up PMC & UMC for $80/500 not too long ago. I shoot lots of Wolf at $120/1000.
The 40 year old GI ammo I shot 20 years ago didn't seem particularly potent or in any way special other than being a PITA to reload because of the crimped in primers.
PMP from South Africa is supposed to be good, but its 220gr Ball.
I rarley pass up brass cased reloadable 45ACP if I see it for about $8 a box of 50. Doesn't go bad, and doesn't seem to be getting any cheaper.
Try
www.outdoormarksman.com www.kyimports.com www.wideners.com www.jgsales.com etc. and see what's available. I've also had good luck at certain gun shows -- these I tend to go back to when I'm getting low on ammo, but its hit and miss.
I'm happy to buy surplus ammo if its non-corrosive and cheaper than decent "value priced" ammo. My CETME, FAL & M1A have never shot anything but surplus ammo -- I've even had good luck with the "Indian" OFV 96 ammo that everyone else says to avoid, at $99.95/1000 I had to take a chance and see for myself. Since there does seem to be some bad lots of it out there I doubt I'll get any more, besides Portugese surplus at ~$140/1000 is pretty darn good stuff.
I shoot lots of my reloads too, but finding time to do it has been a problem lately -- reloading cuts in to the time I have available to go to the range these days.
--wally.