I do this all the time. Go in to buy one item and see something else that I think I "need".

My last purchase like that was to buy a pair of
Vittoria Rubino III tires (700x25) so I could ride the CX bike on the road. While I was looking around the store (REI) I also picked up a pair of
Cannondale gloves. Now I have 6 pairs of half finger gloves.
__________________
The Lord is merciful and gracious, slow to anger and abounding in steadfast love. - Psalm 103:8
I am a cyclist. I am not the fastest or the fittest. But I will get to where I'm going with a smile on my face.