yeah, you probably can't get much food for $5.50 -- that's just below a standard fast food meal. Sit down restaurants run closer to $10 -- can be lower if you just get an appetizer and don't get a drink.

If you are interested, I'm pretty sure many restaurants have online menus you can look up.

For me ( not sure if you wanted feedback or opinions, but... )

Let's say you saw a piece of money lying in a mud puddle. You know that the mud is clean (no feces, no insects, nothing spoiled or rotten, not smelly), and that no one owns the money so there's no moral obligation to return it. It's a quarter -- would you pick it up?

anything above a quarter for mud ( assuming I was having a day where I felt like leaning down )
anything $5 and above ( if I was having a day where trying to lean down would suck )
a thorny bush or something where there was a risk of injury would require say, $5 and above

Or, say you're in a restaurant, and you see two menu items that are similar in class, and differ slightly in price. You're willing to try either. At which point does the price difference become a factor?

I don't consider anything above say, $2 or $3 as slightly, so that'd be the answer.