I have 1 Morgan dollar, I've always been interested in collecting them. However I have never seen them priced at less than a 25% premium over spot. Similar with gold. It makes me question their value as an investment.
Nowadays Morgans are collected for their coin value/coin collections and not as a silver investment. You want to invest in silver, buy the non-coin rounds and silver bars.
Even the very low grade Morgans of AG (date just readable) and G (full date but coin very very worn) are still gonna have a coin value over/above the silver value.
Even a Morgan of VG condition (looks terrible) has only lost 3% of its' silver due to use/circulation.