Look at the CZ97. It works out-of-the-box, accurate, steel, about half your budget ($550.00 new, 450.00 used).
Do a lot of research before you buy. Many of the high price 1911 models (clones, knockoffs, etc.) models are just that, high priced without benefit for the majority of shooters.
The CZ line of pistols offers the biggest bang for the buck in today's market.
If given a $1000.00 1911 .45, I'd sell it, take the money, buy a CZ97, and take the difference in ammo or buy a used CZ97.
Good luck with whatever you choose.
Steve