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I've seen some post in here of a 40-50-60 point gain as their BK fell off, and that's combined with a long history and no other baddies. Solid double digits are definitely do-able.
I wouldn't rely on any simulator other than a FICO simulator. Places like PrivacyGuard offer simulators, but they have zero relation to FICO scoring since the score they are simulating is a FAKO (which is probably why you didn't see a change). I also wouldn't put 100% faith into FICO's simulators. Some swear by them as being very accurate, but my results were always mixed.
Definitely take steps on the collection to get it removed. If paid, send a GW letter. If unpaid, send a PFD.
I would think the BK dropping would give you maybe 15-25 points, depending on the rest of your credit profile. From what I have read from other's posts here and on other boards, ANY neg after the BK really affects how much of an increase you will see, and also Utilization is a big factor too. My Bankruptcy just fell off, and I got a 70 pt boost on EQ, and 44 pts on TU, so there are differences between scoring models as well. My Oldest account is 17yrs, and ave acct age is 5 yrs, 10 mos. I had no bad marks since the BK, and fairly low (6-7%) utilization.
You "should" be able to get to 700 with the Bankruptcy still reporting if you get rid of the collection, and keep your utilization low. Good luck!
BK7 Discharge: October 2004 Starting Score: 590 March 2018 EQ & EX & TU FICO Score: 846 & 847 & 850
Goal Score: 800+ across the board | Goals Hit: 3 Active Cards: 2
Gardening Since: October 2015 Garden Goal: Oct 2018
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