I agree with @Jim517. I doubt you'll find anything worth considering for less than $500.00. I'll be listing my Panasonic soon but it will likely be priced closer to $800.00 (with a little wiggle room for HTF members) as it was one of the top 1080P models available in it's day.
Honestly, you...
I have a recently retired Panasonic PT AE8000U. I haven't gotten around to listing it but PM me if interested and we'll see what we can work out.
https://www.amazon.com/Panasonic-PTAE8000U-1080p-Projector-Model/dp/B009DNXS0Y