First, see what you are looking for.
Second, go online and watch the silver prices for a few weeks.
Right now, Liberty and Franklins are at a melt value of around $6.50
Your best bet is to buy a roll and pick out the ones you want, then sell the rest.
Most likely local shops are a bit pricey, but I generally will use eBay.
However, the running price for Morgan culls at a melt price is around $15-$25
For the Morgan coins, I would call some local coin shops, or just keep looking online.