The ad says "Like new" - so it should look like new - or fairly close. Bore should be clear and shiny and the rifling should be crisp/sharp. There should be no marks on any surface of the gun, other than very light, superficial scratches - that look like they would buff out, easily.
#### the hammer and while holding the hammer cocked, squeeze the trigger and wiggle the cylinder on its rotational axis - do this on each chamber - there should be very little, to no play on "lock-up".
The dies and reloading components - and holsters, could add anywhere from $100 to $??? - depending on quality and quantity.
If you can, take someone with you, who has good knowledge about fire arms - and then you can ignore all of the preceeding "tips".