If you are "missing" a Buy/Sell/Trade/ISO thread, and have tried searching your own subscriptions, then the odds are the thread expired and was purged as a matter of routine BST forum maintenance.
Originally Posted by excerpt from Site Posting Rules
B/S/T Forum Organization
To keep searches productive and postings current, listed threads will be deleted after one month (28 days). Please make sure you have all your contact information saved.
It's always a great idea to keep a copy of your thread saved in your computer for an easy cut & paste in starting a new/replacement thread.
Lots more very helpful information is located in our Site Posting Rules
, located in the footer of each SCS page.
When questions come up, please feel welcome to send a PM to me and I'll try to clear things up for you.