From what I understand, it used to be a good deal. Now, not so much.
Lifetime USCF membership

Right now it's $1500 ($750 for seniors 65+). I don't remember the numbers in the past, but it was much cheaper.

https://secure2.uschess.org/webstore/member.php
There is an option to display information on Sustaining, Life and Benefactor Life memberships.

I purchased my lifetime USCF membership in the 1970's for $200. I know someone age 77 who got his for $100. With the rise in prices of memberships over the years, my $200 was recouped about 1985.

$1500! dam, I quess I am wrong
I remember when Superbowl tickets were $1500. This year the're $8000.

Right now it's $1500 ($750 for seniors 65+). I don't remember the numbers in the past, but it was much cheaper.
An alternative is to invest $1500. The interest and/or dividends will pay your USCF dues, and you'll still have your $1500 (there's no guarantee that this will work, but it has for me).
Quite a few years ago, a friend purchased a lifetime USCF membership. Did anyone ever hear of these being offered?