I'd agree that most gun-buffs aren't going to be interested in a Hi Point, either because they have an aversion to them (warranted or no), or because they have plenty of nicer guns.
I'm sure there are plenty of folks out there who'd want to buy it for $75 or more, just to have around. Trouble is finding said folks. You could post it as a "FTF in (your city)" in the THR Sales forum, or could take it with the next time you go to a gunshow and tape a ".45 Pistol, $75" onto your back (seriously, that's what I did once).
It's not that it's a bad gun, but your primary market is a) folks without gun experience that just want a basic gun that shoots. b) gun-folks who are willing to accept the HP makes a solid, basic firearm with no frills, and need a tacklebox/trunk gun. I'd say $50-$75 would be pretty fair to either, with gun-buffs at the lower end of the scale due to preferring new generation, and newbies at the higher end (or more) since they'll never find a comparable deal at the pawnshop or Wal-Mart.
Heck, at a gunshow I'd start it a $99 for the first hour and tick the price down until it sold or I got tired of browsing. Maybe you could trade it for cheap bulk ammo at the next gunshow? If you were in Austin, I'd definitely give you $50 for it...
-MV