To my surprise, I learned this week that I have a $30K+ BofA credit line I wasn't aware of. Apparently, it traces back to an MBNA MC card I never used and told them to cancel when I saw that they were going to bump finance charges up to something like 25%. (Though I wasn't using the card, and I stay clear of finance charges like the plague, I object to usury.) Though card was canceled >5 years ago, it seems they continued the account as a line of credit, and BofA took it over when the subsumed MBNA. So...

I have no use for this BofA line of credit. (When I inquired, I was told the APR is 9.99%. Then I noted the very small print at the bottom of the letter inviting me to use the convenient "access checks" which mentioned a 5% fee for taking a "cash advance" against the line. The hell with that.) Should I keep it open for the "history," though? Has been around since at least 1998, but no activity? Leave it there, but ask BofA to reduce credit line to something like $2K or whatever their minimum is, so it won't look to FICO like I have too much unused credit? (My impulse was to close it, but then wondered if the "history" might be a reason to leave it there.)