HVAC system

college degree

Does a roof and windows count? Or, do those fall under the "house" heading? That was around $20k all done.
Finishing the basement was around $15k, though that's certainly under the house.
Then there's the septic tank we had to replace, that was about $10k.

The cost of a home isn't done with just the mortgage.

My now 5 yr old pc

The #2 McDonald's breakfast meal

Motorcycle. Rode Amtrak with a backpack full of $5700 in cash to go get it and ride it home.

Buying a company.

My PC

The vacant lot next to my house.

After that... probably my wife's engagement ring. And very close after that, a number of dinners at fancy restaurants for large groups of people.

Wait, no... the catering for the wedding cost more than the ring. That's #2 after real estate.

A new HVAC system cost me about 20k, but if that falls under "house" it would go to the 12k CNC machine.

A divorce

Definitely the wedding by a long shot. And mostly because we paid for a venue where we could house a bunch of guests coming from out of state.

Roof rework at $28k.

PC or my Ebike. If it is single purchase, Ebike for sure, 2k after taxes

Well at work I ordered misc PC hardware for ~200k USD equivalent semi-regularly. And once I was the only one present who was an actual full time employee, so I signed the documents for chartering a survey ship for a month.

On the private I think it's my PC. Come to think of it, my three largest expenses have all been PCs. After that it's a guitar.

I once built a 3000 € PC. Can't think of anything more expensive. I will never invest into SLI again. It was totally useless. Made more problems than anything.

That's really tough. I think it was my water heater. It's a heat pump one so it's more expensive upfront but will heat more efficiently.

My sailboat, 20k. More than I’ve ever spent on a boat (or a car), but very worth it to us. It’s our cabin, retirement home, project, and happy place. Of course, we discovered after that the previous owner, bless his heart, hadn’t sealed a cable running through the deck properly and now the whole cabin top is rotten. So that will be a big job to fix. Luckily I can fix that myself, but my heart definitely sank when I discovered it.

Bold of you to assume I can afford a house or a car... for me, it's definitely an academic degree, though I'm not sure that counts as a "purchase".

Nvidia GPU

my kids educations.

Sony Xperia 1 VI ($1K)

Most expensive thing I own, my Strat!

Dirtbike