Altec Bolero 890A vs 890C vs Excelsior 886A

My son is looking at some bookshelf speakers in Minneapolis, MN. Could anyone please comment on the three listed above in general and on the three listed below specifically?

Many thanks.

Vintage Altec Lansing Speakers-Model 890 ?

VINTAGE ALTEC LANSING 886A SPEAKERS

Vintage Altec Lansing 886a Speakers