The single, largest purchase on a credit card, for me, was for the wedding ring for my wife.
And I'm still paying for that ...every day, of every week.
And there's no grace period, guys...none, whatsoever!
(Money well spent, too! I don't regret a nickel of it!)
Love ya, baby!!! 
On a CREDIT card? Approx $300 buying little odds and ends for my new apartment from Walmart. On my debit card, >$5000 on new suspension parts for my pickup. (upgrades are always nice)
Starting Score: MyFico TU: 621 EQ: 610
Whoa look at all the big shooters.
I haven't had any credit cards for long, but probably the most I've ever spent in one setting is about $360 on GROCERIES. Apartment with 4 guys = massive grocery bill.
We take turns paying, so I have a while before it's my turn again. 
Something like $11K? on new flooring and carpeting. Not as a look-at-how-much-I-spent, but we had a 19-year-old cat who had the plumbing issues that you would expect with a 19-year-old cat, and when she moved on to that Great Catnip Patch in the Sky, we yanked out the 20-year-old carpet and replaced it.
I put it on plastic for both convenience and points, and then moved it over to a HELOC.
Not very glam, I agree.
