Need to Archive Expired Post

I have a website which lists deals that expire. Each deal has a custom field with an expiration date. I’m looking to somehow archive the posts when they expire, yet still have them available if you access the link to the deal (since i don’t lose SEO impact). I also would like to have them disappear from the category they are held in.

I tried some code in which i was able to have the expiring posts disappear and archived on the home page loop, but the listing still remained in the category the deal is posted in. Anyone know how to do this?