Hmm, largest purchase of the last twelve months. It depends on what counts as a "purchase" (as opposed to "expense" or "investment" or...)
1-5 - would be multiple pieces of real estate. (Investments?)
6 - Giant tax bill (Expense?)
7 - Insurance bills (Expense?)
If none of those count as a "purchase," I guess plane tickets for a few hundred bucks, or Camp Mustache tickets, or an iPad for like $200?
(I tried looking back the last five years or so, but there was nothing that topped those above items; apparently taxes are my biggest expense every year - the April line on my spending graph looks bad - and I don't spend more than a few hundred on anything, ever.)
EDIT: Actually we did buy motorcycles and had them for a few years. But then we sold them for more than we paid, so it ended up being a net profit, even with the registration, insurance, etc.. so again, I don't know if that counts.