"it looks way cooler than the 7820 and it had that Leonard Nimoy celebrity endorsement."
I believe he also endorsed Betamax too, back then. Are you familiar with the web site Laserdisc Database?
www.LDDb.com
I'm a member there, and they would love to see/read about your PR-7820. If you want another pre-1985 player look for an LD-660 or a PR-8210. Don't waste your time/money on a Magnavox player unless it's for display only...