As a fellow beginner here, finding Pennys in 2026 can be tricky.
You can find pairs for 600ish that need work (nosebridge tune, spring job or lenses). Otherwise 700-1k seems to be the going rate in my experience across a few platforms.
If you’re on eBay looking, sort searches by sold for a more accurate market value. Some of those 1k+ listings have been sitting over a year.