Hopefully you've set yourself up to be self sufficient at your age. I realize that many have not.
I'm only early 30's, but apparently rates have gone way down as competition has gone way up. I forget what my wife an I pay through her trade association, but I want to say it's around $350/yr for both of us, way into the seven figures to be appropriate for our salary and age, 20 year level.
Keep in mind she would only be 50 when the term expired, but the whole point is to meet our needs in case of a freak tragedy, not because we're all going to die someday, and by 50 the house would be long paid off and we will be fully self sufficient.
I can't say anything about your pricing at 64, obviously it will be quite different at 64. A cursory Google search shows lots of 250k for $15/mo, probably oriented to 40-50 somethings. Your actuarial risk ten or more years out will go high, so I'd suspect your rate would be 2-3x that.