Ballpark valuation

Hi all. I'm selling a Norwich Union with-profits endowment policy. start feb 1992 - end 2017 death benefit 1 name (age 51) 32950 sum assured 11698 bonuses 5706 monthly payments 47.60 surrender 11688 13-april-2007

An 'at least' figure would be very helpful.

Thanks for your help.

Arthur