Yes, to get some money, not chump change, you'll need to spend some time grading and providing scans or digital pictures (which is the biggest boost for ensuring a decent price if you're not sure about the grade).

I'll give you one major don't: sending them to a professional grading service to be slabbed. Yes, they'll give you an accurate grade and place it in a clear heavy-duty plastic "slab" for display. While people do spend money on those, you'll pay dearly for that extra service. I would only do that for a key issue, like a #1 or a first appearance of a major character (or just a very old comic).

If you like, you can PM me a list if you have one. I can do a little better than my usual two cents that way.