Can't speak for the parent, but here is the one I use: https://www.amazon.com/Merkur-HD-34C-Chrome-Plated/dp/B001LY...

You'll want to try a few different brands of blade with it, as there's no one "silver bullet" blade that works best for everybody. Lots of vendors sell sample packs on Amazon containing a few blades each from a bunch of different brands. Here's an example: https://www.amazon.com/Double-Edge-Razor-Blade-Sample/dp/B01...

If you want to really nerd out on this subject, the place to be is the Badger & Blade forums: https://www.badgerandblade.com/forum/

I use the basic safety razor from Maggards: https://www.maggardrazors.com/product/maggard-razors-basic-s...

It's very late, but I'm here with another recommendation. I use Astra brand safety razors. I get a pack of 100 for less than ten dollars. They always seem to last much longer than any of those disposable blades I used to buy (e.g. Mach 3). A lot longer.

I think the other commenters have answered this question better than I could at this point. I originally bought mine through a "The Art Of Shaving" retail store on a whim when I saw one at a mall. They're overpriced and I wouldn't necessarily buy from them again.

If you don't need new, you can get perfectly fine vintage razors from eBay for ~$20. I have a Gillette SuperSpeed from the 60's that's served me well for eight years now.