Therese, your post made me smile, because it is how I wish I did my purchasing.
It sounds so sensible and deliberate, well-planned and decisive.
We fell into our first purchase (a South African week) at the suggestion of friends, over a few glasses of wine. The next few were e-bay trigger finger mistakes, totally unplanned and the last few have been freebies that the resort was giving away.

Some day, I hope to make a well-researched purchase.