"Must have" ... I know the feeling.
One USENET newsgroup explained it to me. They were into knives (making,. sharpening, collecting etc) but the smae uidea applies to seeds and plants.
"It's not about NEEDING more seeds / plants / knives.
It's about being DELIGHTED by more seeds / plants /knives."
The short form was: "It's not about need, it's about delight".
My first problem would be admiting that I have a problem. The only part of it I would wnat to chnage is having more room and time to grow them out!
Maybe I should keep records of costs, and just give myself a budget. But if I stopped buying from commercial sources, I'd be flooding the post office with trade mailers. I keep expecting a clerk at Wal-Mart toget suspicious about all those little Ziplocs that I buy.