I doubt paying the collection accounts alone will increase your scores by 70 points. If you pay for delete then you will see a significant score increase. The two 30 days late on your installment is going to keep your score down too.
If you can negotiate PFD's you stand a chance of getting your scores up by 70 points. If any of the accounts you PDF is your oldest tradeline, you may see a decrease in your scores.PFD'ing an old tradeline will decrease your cedit history age.
It won't hurt to have the old account reopened long as the creditor doesnt make the account new. If the account was opened in 2005, and they reopen it, you want to make sure they report the account opened in 2005 and not 2009.
Thanks for your reply. I value your response. Where can I find a good example letter for pay for delete?