Very nice looking Ike set

Nothing wrong with the Littleton album, but not the
album most choose. I like Dansco with slip covers
the most. The Littleton albums in some cases increase
the chances of the coins to tone. Some like that, some
don't.
IMO, your set is closer to the $200 range than the $500.
When I look at a Ike set, I look at the 1971 and 1972
P and D coins. These in higher grades have good value.
I also look for super grades of any of the coins.
Also check the 1972 to see if it is a Type 2.
My collection is mostly geared toward albums, and Dansco
are my favorite. Others may like other albums or lean
towards Slabs or air-tite capsules.
There is no right answer.