haven't been shopping since our #1 poster child for the gun industry was elected 6 yrs ago.
that said, I never even considered a 1911 new in the box...just too pricey for my budget.
however,
I've jumped on a pretty,used, 1911 more than once..and always in your price range.
1) Springfield ultra - 1 mag, no box, very light use..know the original owner. $450
2) Kimber eclipse model - had already been sent back to Kimber for the complete upper replacement (external extractor issue)..was in like new condition when the 75 yr old owner passed away and his wife was standing in the gun store selling all his stuff...what they were offering was obscene. i bumped it to what i had on me and she was happy.
the kimber was in it's orginal case , all the papers, lock, etc still in the plastic, 2 spare kimber mags, 2 wilson combat mags, leather holster, leather spare mag hostler $700
3) springfield 1911 w/crimson trace grip, 2 spare mags <500rds through it..know the owner, leather holster $700
couple more ..but you get the idea.
keep some cash on you for when the moment strikes...and be patient...kinda like fishing