I'm probably not like most because I change mine at least twice a week. I'm fairly active and I like a new faceplate on especially before an important business meeting. Plus I always use M9 deodorant drops and stoma paste, which can add up. So, to answer your question I spend about
$125/month on supplies. I never had the kind of seal that would let me go more than a few days without it loosening up. The extra cost is worth the peace of mind to me. So, after 17 years with an ostomy, I've spent about
$25K on supplies. If you figure I change my appliance at least twice a week(usually 3 times), over 17 years is over 1,700 changes!!!