Re: This may sound stupid but
I can totally relate to your post. I have similar obsessions (and others). My obsessions that have to do with material items change once I've purchased the item(s) I keep thinking about. For example, if I go to buy clothes and I see pants that I like, I buy them in every color because if I only buy 1 color, I obsess about the rest. These days my shopping obsessions focus on furniture. My husband and I purchased a home a year and a half ago. Since then, I occupy my mind with how I want to furnish it. Right now i'm obsessing about an armoire that I really like. Last month it was bed linens, prior to that it was curtains etc...I'm not in debt because I do strictly budget myself and I don't buy anything on credit but I think about the next item I want to buy constantly. I didn't really associate it with OCD until recently when my mother made a comment that I was obsessed with shopping. She was joking but it finally occurred to me that it is my OCD. I just wanted you to know that someone else relates to your post.
Best of luck,