-Same price of ticket in cash
What do you mean by ticket?
And I'm not sure about people from the South but we tend to give cash (usually) instead of gifts from the registries because 1) I personally would prefer cash 2) registries seem to always mess things up 3) we're lazy.
We tend to give $100.00 - $250.00 as a gift unless the wedding is super fancy in which case we try to spend as much or more on their gift as we assume they are spending to feed/entertain us.
For instance, the fanciest wedding I've ever been to we gave them a $600.00 crystal vase. This wedding was so fancy, they had the cake flown in from New York and also had different lighting wired into the final reception area....I guess they thought the pre-reception reception area's lighting was acceptable.