The perfect mitzvah

So, you paid more for the lulav and etrog than you had intended? Compounded by the ones you bought for your children, the expense was unexpected?
I read an interesting post on revach.net about the 17 requirements for a perfect mitzvah. The 17th on the list will make you feel better about how much you spent for the mitzvah of arba minim.

The Sefer Chareidim says that when you do a mitzva you must do it B'Shleimus. There are 17 requirements to doing a mitzva with perfection. When you do this the mitzva will go up before Hashem and it will be received with Ratzon. Only then will we avoid embarrassment in the world to come.
It is written that for each mitzva when you come to Shamayim there will be a Bais Din that determines if you have done the mitzva. Each mitzva though, will have many Batei Din, each one for a specific aspect of that mitzva. When they ask you if you did a mitzva and you did it out of fear but not out of love for example, the Bais Din of Ahava will determine that you have not performed that mitzva. This is what will happen in each one of the 17 Batei Dinim.
Read the list and ask yourself, is there any mitzva that I have really done B'Shleimus?
...17. Pay For It
The Zohar says that by paying full price an not trying to bargain, you remove the Ruach Tuma from the mitzva. Do not fret over the money.
Read full list at http://www.revach.net/lists/article.php?id=20